Category: Matlab
Category Archives: Matlab
Legend for tiled donut charts
I have a 2×3 tiled layout.
In the first row, I put three donut charts (one per each "cell"). The figure is attached.
What I want to do is to put a unique legend for them in the whole second row. I saw that this is possible for other types of charts and interesting options were suggested to other users. The main problem is that the properties for the legend of donut charts are very limited.
Suggestions?
Thank you!I have a 2×3 tiled layout.
In the first row, I put three donut charts (one per each "cell"). The figure is attached.
What I want to do is to put a unique legend for them in the whole second row. I saw that this is possible for other types of charts and interesting options were suggested to other users. The main problem is that the properties for the legend of donut charts are very limited.
Suggestions?
Thank you! I have a 2×3 tiled layout.
In the first row, I put three donut charts (one per each "cell"). The figure is attached.
What I want to do is to put a unique legend for them in the whole second row. I saw that this is possible for other types of charts and interesting options were suggested to other users. The main problem is that the properties for the legend of donut charts are very limited.
Suggestions?
Thank you! donut chart, legend, tiled layout MATLAB Answers — New Questions
keep exact position of subplot axes
I want to plot three 2D projections of some 3D data. For compatibility with other images (our convention) I need to keep the position of the corresponding axes identical – see Fig.
Is there any (simple) way to do this? The layout in the image is the result of interactive manipulation with the size of the image – not entirely convenient 🙁
‘Subplot’ or ‘nexttile’ with tiledlayout(2,2,’TileSpacing’,’none’); can’t do it.
Of course, it would be possible to plot all the data in one axis (after a simple recalculation of the coordinates), but the advantage of individual axes for each (sub)projection would be lost …
function plot3x2D
close all
clear all
NN=10;
x=rand(1,NN);
y=rand(1,NN);
z=rand(1,NN);
val=rand(1,NN);
figure; hold on
axis off
a11=axes(‘pos’,[0.05 0.5 0.45 0.45],’XaxisLocation’,’top’,"Xdir",’reverse’);
hold on
scatter(x,y,val*200,val,’filled’,’Markerfacealpha’,0.6);
axis equal
set(gca,’xlim’,[0 1]);
set(gca,’ylim’,[0 1]);
box on
a12=axes(‘pos’,[0.5 0.5 0.45 0.45],’Yaxislocation’,’right’);
hold on
scatter(z,y,val*200,val,’filled’,’Markerfacealpha’,0.6);
axis equal
set(gca,’xlim’,[0 1]);
set(gca,’ylim’,[0 1]);
box on
a21=axes(‘pos’,[0.05 0.05 0.45 0.45],"Xdir",’reverse’);
hold on
scatter(x,z,val*200,val,’filled’,’Markerfacealpha’,0.6);
axis equal
set(gca,’xlim’,[0 1]);
set(gca,’ylim’,[0 1]);
box on
aa=1;
end
%==============eof==================I want to plot three 2D projections of some 3D data. For compatibility with other images (our convention) I need to keep the position of the corresponding axes identical – see Fig.
Is there any (simple) way to do this? The layout in the image is the result of interactive manipulation with the size of the image – not entirely convenient 🙁
‘Subplot’ or ‘nexttile’ with tiledlayout(2,2,’TileSpacing’,’none’); can’t do it.
Of course, it would be possible to plot all the data in one axis (after a simple recalculation of the coordinates), but the advantage of individual axes for each (sub)projection would be lost …
function plot3x2D
close all
clear all
NN=10;
x=rand(1,NN);
y=rand(1,NN);
z=rand(1,NN);
val=rand(1,NN);
figure; hold on
axis off
a11=axes(‘pos’,[0.05 0.5 0.45 0.45],’XaxisLocation’,’top’,"Xdir",’reverse’);
hold on
scatter(x,y,val*200,val,’filled’,’Markerfacealpha’,0.6);
axis equal
set(gca,’xlim’,[0 1]);
set(gca,’ylim’,[0 1]);
box on
a12=axes(‘pos’,[0.5 0.5 0.45 0.45],’Yaxislocation’,’right’);
hold on
scatter(z,y,val*200,val,’filled’,’Markerfacealpha’,0.6);
axis equal
set(gca,’xlim’,[0 1]);
set(gca,’ylim’,[0 1]);
box on
a21=axes(‘pos’,[0.05 0.05 0.45 0.45],"Xdir",’reverse’);
hold on
scatter(x,z,val*200,val,’filled’,’Markerfacealpha’,0.6);
axis equal
set(gca,’xlim’,[0 1]);
set(gca,’ylim’,[0 1]);
box on
aa=1;
end
%==============eof================== I want to plot three 2D projections of some 3D data. For compatibility with other images (our convention) I need to keep the position of the corresponding axes identical – see Fig.
Is there any (simple) way to do this? The layout in the image is the result of interactive manipulation with the size of the image – not entirely convenient 🙁
‘Subplot’ or ‘nexttile’ with tiledlayout(2,2,’TileSpacing’,’none’); can’t do it.
Of course, it would be possible to plot all the data in one axis (after a simple recalculation of the coordinates), but the advantage of individual axes for each (sub)projection would be lost …
function plot3x2D
close all
clear all
NN=10;
x=rand(1,NN);
y=rand(1,NN);
z=rand(1,NN);
val=rand(1,NN);
figure; hold on
axis off
a11=axes(‘pos’,[0.05 0.5 0.45 0.45],’XaxisLocation’,’top’,"Xdir",’reverse’);
hold on
scatter(x,y,val*200,val,’filled’,’Markerfacealpha’,0.6);
axis equal
set(gca,’xlim’,[0 1]);
set(gca,’ylim’,[0 1]);
box on
a12=axes(‘pos’,[0.5 0.5 0.45 0.45],’Yaxislocation’,’right’);
hold on
scatter(z,y,val*200,val,’filled’,’Markerfacealpha’,0.6);
axis equal
set(gca,’xlim’,[0 1]);
set(gca,’ylim’,[0 1]);
box on
a21=axes(‘pos’,[0.05 0.05 0.45 0.45],"Xdir",’reverse’);
hold on
scatter(x,z,val*200,val,’filled’,’Markerfacealpha’,0.6);
axis equal
set(gca,’xlim’,[0 1]);
set(gca,’ylim’,[0 1]);
box on
aa=1;
end
%==============eof================== particular subplots position MATLAB Answers — New Questions
How is ComponentProportion calculated by fitgmdist
I run fitgmdist on some data (total of 40 instances/samples) and and get a two-component Gaussian Mixture Model with ComponentProportion containing an array of two values: 0.8927 and 0.1073. Using the cluster method on the resulting gmdistribution, and passing in the original 40-element array, it returns an array of cluster IDs, 36 of which have the value "1", and 4 of which have the value "2". My expectation was that ComponentProportion would have contained exactly [0.9, 1.0] to reflect the ratios of cluster IDs in the data being fit. But apparently that’s not the case. Can anyone tell me where the actual ComponentProportion values come from? Thanks.I run fitgmdist on some data (total of 40 instances/samples) and and get a two-component Gaussian Mixture Model with ComponentProportion containing an array of two values: 0.8927 and 0.1073. Using the cluster method on the resulting gmdistribution, and passing in the original 40-element array, it returns an array of cluster IDs, 36 of which have the value "1", and 4 of which have the value "2". My expectation was that ComponentProportion would have contained exactly [0.9, 1.0] to reflect the ratios of cluster IDs in the data being fit. But apparently that’s not the case. Can anyone tell me where the actual ComponentProportion values come from? Thanks. I run fitgmdist on some data (total of 40 instances/samples) and and get a two-component Gaussian Mixture Model with ComponentProportion containing an array of two values: 0.8927 and 0.1073. Using the cluster method on the resulting gmdistribution, and passing in the original 40-element array, it returns an array of cluster IDs, 36 of which have the value "1", and 4 of which have the value "2". My expectation was that ComponentProportion would have contained exactly [0.9, 1.0] to reflect the ratios of cluster IDs in the data being fit. But apparently that’s not the case. Can anyone tell me where the actual ComponentProportion values come from? Thanks. gaussian mixture model fitgmdist gmdistribution componentproportion MATLAB Answers — New Questions
FixedwingGNC model issue while limiting it to guided taxi mission
Problem: I am encountering an issue with the taxi-guided mission in the Fixedwing GNC Simulink model, where the aircraft is not performing the takeoff sequence but should only taxi on the ground. I want the plane to stay on the ground and follow the waypoints without initiating flight.
Hardware: I am using the Pixhawk 6C with Hardware-in-the-Loop (HITL) simulation to monitor the output and perform tuning.
Actions Taken:
I have assigned waypoints with an altitude of 0 to ensure the aircraft stays on the ground.
I have set the Takeoff IC to unit8(0) to skip the takeoff sequence and directly start the mission at the waypoints.
I have included parameters such as {airspeedAltitude, lateralGuidance, Control.L1, control.cruisespeed, control.climbalt, and state.course} in the waypoints to feed the required data to the model, similar to the information available in the Takeoff block.
Current Behavior:
The model progresses through the waypoints but fails to turn towards the next waypoints as expected. The aircraft continues moving straight without any directional correction.
The data at the [send to Actuator] output block is showing zero, but the aircraft still moves.
Attempts Made: I have tried several configurations and adjustments to achieve the desired result, but I have been unable to resolve the issue.
Kindly guide me with this.Problem: I am encountering an issue with the taxi-guided mission in the Fixedwing GNC Simulink model, where the aircraft is not performing the takeoff sequence but should only taxi on the ground. I want the plane to stay on the ground and follow the waypoints without initiating flight.
Hardware: I am using the Pixhawk 6C with Hardware-in-the-Loop (HITL) simulation to monitor the output and perform tuning.
Actions Taken:
I have assigned waypoints with an altitude of 0 to ensure the aircraft stays on the ground.
I have set the Takeoff IC to unit8(0) to skip the takeoff sequence and directly start the mission at the waypoints.
I have included parameters such as {airspeedAltitude, lateralGuidance, Control.L1, control.cruisespeed, control.climbalt, and state.course} in the waypoints to feed the required data to the model, similar to the information available in the Takeoff block.
Current Behavior:
The model progresses through the waypoints but fails to turn towards the next waypoints as expected. The aircraft continues moving straight without any directional correction.
The data at the [send to Actuator] output block is showing zero, but the aircraft still moves.
Attempts Made: I have tried several configurations and adjustments to achieve the desired result, but I have been unable to resolve the issue.
Kindly guide me with this. Problem: I am encountering an issue with the taxi-guided mission in the Fixedwing GNC Simulink model, where the aircraft is not performing the takeoff sequence but should only taxi on the ground. I want the plane to stay on the ground and follow the waypoints without initiating flight.
Hardware: I am using the Pixhawk 6C with Hardware-in-the-Loop (HITL) simulation to monitor the output and perform tuning.
Actions Taken:
I have assigned waypoints with an altitude of 0 to ensure the aircraft stays on the ground.
I have set the Takeoff IC to unit8(0) to skip the takeoff sequence and directly start the mission at the waypoints.
I have included parameters such as {airspeedAltitude, lateralGuidance, Control.L1, control.cruisespeed, control.climbalt, and state.course} in the waypoints to feed the required data to the model, similar to the information available in the Takeoff block.
Current Behavior:
The model progresses through the waypoints but fails to turn towards the next waypoints as expected. The aircraft continues moving straight without any directional correction.
The data at the [send to Actuator] output block is showing zero, but the aircraft still moves.
Attempts Made: I have tried several configurations and adjustments to achieve the desired result, but I have been unable to resolve the issue.
Kindly guide me with this. px4, drones, uav, simulink, fixedwing, waypoints, matlab function, mission, taxi MATLAB Answers — New Questions
Hello everyone, can anyone provide me the matlab code of FD SLIC algorithm or FM SLIC algorithm
I am working on a project which requires the matlab code of FD SLIC algorithm …I am working on a project which requires the matlab code of FD SLIC algorithm … I am working on a project which requires the matlab code of FD SLIC algorithm … slic algorithm MATLAB Answers — New Questions
PLL Simulink 3 phase grid
Hi everybody,
I’ve found a Simulink model for a PLL for 3 phase grid. It works very well, but I don’t understand the purpose of a block called ‘actual amplitude detection’. It computes the followings: square of the magnitude, low pass filter the result (this is done for all the 3 phases), and then the maximum between the 3 signals. This value is then used to normalize the signals that represent the input grid.
Can you please tell me why is this done, why I cannot normalize the input grid with a fixed value (for example 400V)? Why is this method better, I don’t understand the principle, the theory behind this?
Many thanks,
MonicaHi everybody,
I’ve found a Simulink model for a PLL for 3 phase grid. It works very well, but I don’t understand the purpose of a block called ‘actual amplitude detection’. It computes the followings: square of the magnitude, low pass filter the result (this is done for all the 3 phases), and then the maximum between the 3 signals. This value is then used to normalize the signals that represent the input grid.
Can you please tell me why is this done, why I cannot normalize the input grid with a fixed value (for example 400V)? Why is this method better, I don’t understand the principle, the theory behind this?
Many thanks,
Monica Hi everybody,
I’ve found a Simulink model for a PLL for 3 phase grid. It works very well, but I don’t understand the purpose of a block called ‘actual amplitude detection’. It computes the followings: square of the magnitude, low pass filter the result (this is done for all the 3 phases), and then the maximum between the 3 signals. This value is then used to normalize the signals that represent the input grid.
Can you please tell me why is this done, why I cannot normalize the input grid with a fixed value (for example 400V)? Why is this method better, I don’t understand the principle, the theory behind this?
Many thanks,
Monica simulink pll normalization MATLAB Answers — New Questions
How can i detect the amplitude of a sinusoidal signal in Simulink ?
Hello,
I am working on a project in Simulink … i want to extract the amplitude of a sinusoidal signal as it shown below … how can i extract the value of the amplitude in simulink ? the frequency of the signal is variant with time .Thanks in advance
<</matlabcentral/answers/uploaded_files/114375/k.PNG>>Hello,
I am working on a project in Simulink … i want to extract the amplitude of a sinusoidal signal as it shown below … how can i extract the value of the amplitude in simulink ? the frequency of the signal is variant with time .Thanks in advance
<</matlabcentral/answers/uploaded_files/114375/k.PNG>> Hello,
I am working on a project in Simulink … i want to extract the amplitude of a sinusoidal signal as it shown below … how can i extract the value of the amplitude in simulink ? the frequency of the signal is variant with time .Thanks in advance
<</matlabcentral/answers/uploaded_files/114375/k.PNG>> simulink, signal, amplitude, detect, extract amplitude MATLAB Answers — New Questions
Opening multiple instances of MATLAB causes endless folder access errors
Whenever I try to open two instances of MATLAB, I run into an endless loop of error windows. For example, if I’m running 2022b and I try to start an instance of 2021b, I get this popup message:
“MATLAB_R2021b” would like to access files in your Documents folder.
When I click OK, I get this popup message:
“MATLAB_R2022b” would like to access files in your Documents folder.
When I click OK, I get this popup message:
“MATLAB_R2021b” would like to access files in your Documents folder.
When I click OK, I get this popup message:
“MATLAB_R2022b” would like to access files in your Documents folder.
When I click OK, I get this popup message:
“MATLAB_R2021b” would like to access files in your Documents folder.
When I click OK, I get this popup message:
“MATLAB_R2022b” would like to access files in your Documents folder.
…and so on.
I’m using a Mac OS Monterey 12.6.1.
Does anyone know how to fix this?Whenever I try to open two instances of MATLAB, I run into an endless loop of error windows. For example, if I’m running 2022b and I try to start an instance of 2021b, I get this popup message:
“MATLAB_R2021b” would like to access files in your Documents folder.
When I click OK, I get this popup message:
“MATLAB_R2022b” would like to access files in your Documents folder.
When I click OK, I get this popup message:
“MATLAB_R2021b” would like to access files in your Documents folder.
When I click OK, I get this popup message:
“MATLAB_R2022b” would like to access files in your Documents folder.
When I click OK, I get this popup message:
“MATLAB_R2021b” would like to access files in your Documents folder.
When I click OK, I get this popup message:
“MATLAB_R2022b” would like to access files in your Documents folder.
…and so on.
I’m using a Mac OS Monterey 12.6.1.
Does anyone know how to fix this? Whenever I try to open two instances of MATLAB, I run into an endless loop of error windows. For example, if I’m running 2022b and I try to start an instance of 2021b, I get this popup message:
“MATLAB_R2021b” would like to access files in your Documents folder.
When I click OK, I get this popup message:
“MATLAB_R2022b” would like to access files in your Documents folder.
When I click OK, I get this popup message:
“MATLAB_R2021b” would like to access files in your Documents folder.
When I click OK, I get this popup message:
“MATLAB_R2022b” would like to access files in your Documents folder.
When I click OK, I get this popup message:
“MATLAB_R2021b” would like to access files in your Documents folder.
When I click OK, I get this popup message:
“MATLAB_R2022b” would like to access files in your Documents folder.
…and so on.
I’m using a Mac OS Monterey 12.6.1.
Does anyone know how to fix this? error MATLAB Answers — New Questions
Can two users have access and use matlab on one computer?
We have one shared windows computer with Matlab installed and two users who wants to access and work with matlab not at the same time. Is this possible? if yes, how do I have to setup this solution?We have one shared windows computer with Matlab installed and two users who wants to access and work with matlab not at the same time. Is this possible? if yes, how do I have to setup this solution? We have one shared windows computer with Matlab installed and two users who wants to access and work with matlab not at the same time. Is this possible? if yes, how do I have to setup this solution? matlab accesss by two users MATLAB Answers — New Questions
Modulating of OFDM signal
i want to ask how i can modulate the OFDM signal to higher frequency (2MHz for example) in Matlab simulinki want to ask how i can modulate the OFDM signal to higher frequency (2MHz for example) in Matlab simulink i want to ask how i can modulate the OFDM signal to higher frequency (2MHz for example) in Matlab simulink papr ofdm MATLAB Answers — New Questions
(Code) How to generate the DSB-SC using message signal (tone modulation)
*(Code) How to generate the DSB-SC using message signal (tone modulation) with frequency 2kHz and a carrier signal of frequency 100kHz**(Code) How to generate the DSB-SC using message signal (tone modulation) with frequency 2kHz and a carrier signal of frequency 100kHz* *(Code) How to generate the DSB-SC using message signal (tone modulation) with frequency 2kHz and a carrier signal of frequency 100kHz* tone modulation, dsb-sc, how to generate dsb-sc, how to generate dsb-sc using a message signal tone modulation MATLAB Answers — New Questions
Simulink error “variable-size matrix but its size is specified as inherited or fixed”
I’m building a MPC controller for a state space plant (, , with , , ).
I implemented the MPC as Matlab function, whose inputs are
enable (a flag that enables the controller. If it is equal to false, then the outputs are set equal to zero);
X_ref (a vector of size , with the reference state value for each step in the prediction horizon );
U_ref (a vector of size , with the reference input value for each step in the prediction horizon );
x_k ( a vector of the current state );
mpc (a structure with the data for the MPC implementation and all the preprocessed matrices; this is the only function input of type "parameter data"; it’s value is read from matlab workspace).
The output is the vector , that is the control action for the plant. It is constructed in the following way
function u_k = mpc_controller(enable, X_ref, U_ref, x_k, mpc)
if enable
…
[z_opt, ~, flag] = quadprog((H+H’)./2, f, Ain, bin, Aeq, beq, lb, ub, [], options);
else
idx = 1;
z_opt = zeros(mpc.nu, 1);
end
u_k = z_opt(idx:(idx+mpc.nu-1));
where mpc.nu is , while idx is a index appositely constructed in the code.
The same function works perfectly when running in Matlab, but once exported into simulink in the Matlab function, the following error rises:
Error: ‘u_k’ is inferred as a variable-size matrix, but its size is specified as inherited or fixed. Verify ‘u_k’ is defined in terms of non-tunable parameters, or select the ‘Variable Size’ check box and specify the upper bounds in the Size box.
I fixed the u_k value in the property inspector (inside the matlab function block) equal to mpc.nu, that is the actual length of the output, since it cannot have the feature "variable size" because one of the block in series with the matlab function block is a demux.
Do you have any idea on how to manage this problem? Thanks in advanceI’m building a MPC controller for a state space plant (, , with , , ).
I implemented the MPC as Matlab function, whose inputs are
enable (a flag that enables the controller. If it is equal to false, then the outputs are set equal to zero);
X_ref (a vector of size , with the reference state value for each step in the prediction horizon );
U_ref (a vector of size , with the reference input value for each step in the prediction horizon );
x_k ( a vector of the current state );
mpc (a structure with the data for the MPC implementation and all the preprocessed matrices; this is the only function input of type "parameter data"; it’s value is read from matlab workspace).
The output is the vector , that is the control action for the plant. It is constructed in the following way
function u_k = mpc_controller(enable, X_ref, U_ref, x_k, mpc)
if enable
…
[z_opt, ~, flag] = quadprog((H+H’)./2, f, Ain, bin, Aeq, beq, lb, ub, [], options);
else
idx = 1;
z_opt = zeros(mpc.nu, 1);
end
u_k = z_opt(idx:(idx+mpc.nu-1));
where mpc.nu is , while idx is a index appositely constructed in the code.
The same function works perfectly when running in Matlab, but once exported into simulink in the Matlab function, the following error rises:
Error: ‘u_k’ is inferred as a variable-size matrix, but its size is specified as inherited or fixed. Verify ‘u_k’ is defined in terms of non-tunable parameters, or select the ‘Variable Size’ check box and specify the upper bounds in the Size box.
I fixed the u_k value in the property inspector (inside the matlab function block) equal to mpc.nu, that is the actual length of the output, since it cannot have the feature "variable size" because one of the block in series with the matlab function block is a demux.
Do you have any idea on how to manage this problem? Thanks in advance I’m building a MPC controller for a state space plant (, , with , , ).
I implemented the MPC as Matlab function, whose inputs are
enable (a flag that enables the controller. If it is equal to false, then the outputs are set equal to zero);
X_ref (a vector of size , with the reference state value for each step in the prediction horizon );
U_ref (a vector of size , with the reference input value for each step in the prediction horizon );
x_k ( a vector of the current state );
mpc (a structure with the data for the MPC implementation and all the preprocessed matrices; this is the only function input of type "parameter data"; it’s value is read from matlab workspace).
The output is the vector , that is the control action for the plant. It is constructed in the following way
function u_k = mpc_controller(enable, X_ref, U_ref, x_k, mpc)
if enable
…
[z_opt, ~, flag] = quadprog((H+H’)./2, f, Ain, bin, Aeq, beq, lb, ub, [], options);
else
idx = 1;
z_opt = zeros(mpc.nu, 1);
end
u_k = z_opt(idx:(idx+mpc.nu-1));
where mpc.nu is , while idx is a index appositely constructed in the code.
The same function works perfectly when running in Matlab, but once exported into simulink in the Matlab function, the following error rises:
Error: ‘u_k’ is inferred as a variable-size matrix, but its size is specified as inherited or fixed. Verify ‘u_k’ is defined in terms of non-tunable parameters, or select the ‘Variable Size’ check box and specify the upper bounds in the Size box.
I fixed the u_k value in the property inspector (inside the matlab function block) equal to mpc.nu, that is the actual length of the output, since it cannot have the feature "variable size" because one of the block in series with the matlab function block is a demux.
Do you have any idea on how to manage this problem? Thanks in advance simulink, matlab function, variable-size matrix MATLAB Answers — New Questions
How to find volume of a curve [f(x)] which is rotated along y-axis?
We have a input function y = f(x) and we have to find the volume along x-axis and y-axis. (solid of revolution) The minimum and maximum values of x are given
I am getting the volume along x-axis but I am getting an error while finding the volume along the y-axis.
The values of f(x) and domain is : –
x^(1/2), 0<=x<=4
3*cos(0.4*x+pi), -5<=x<=5
sin(x)+3, -5<=x<=5
x^3, 0<=x<=3
Here is my code
%Volume along x-axis
clc
clear all
syms x y
%fx = input(‘Enter the function : ‘)
xmin = input(‘Enter minimum value of x : ‘)
xmax = input(‘Enter maximum value of x : ‘)
intfx = int((fx)^2,xmin,xmax)
vx = pi*(intfx)
vx = double(vx)
sprintf(‘The volume along x-axis is %d’,vx)
%Volume along y-axis
y_fx_equation_wrt_x = y == fx
x_fy_equation_wrt_y = solve(y_fx_equation_wrt_x, x)
fy = x_fy_equation_wrt_y
ymin = subs(fx,x,xmin)
ymax = subs(fx,x,xmax)
intfy = abs(int(fy^2,ymin,ymax))
vy = pi*(intfy)
vyy = double(vy)
sprintf(‘The volume along y-axis is %d’,vyy)
In output 1 I get an error but on output 2 I don’t.
What am I doing wrong?
Output 1
y = 3*cos(0.4*x+pi)
3*cos(0.4*x+pi)
fx =
-3*cos((2*x)/5)
Enter minimum value of x :
-5
xmin =
-5
Enter maximum value of x :
5
xmax =
5
intfx =
(45*sin(4))/4 + 45
vx =
pi*((45*sin(4))/4 + 45)
vx =
114.6241
ans =
‘The volume along x-axis is 1.146241e+02’
y_fx_equation_wrt_x =
y == -3*cos((2*x)/5)
x_fy_equation_wrt_y =
(5*pi)/2 – (5*acos(y/3))/2
(5*pi)/2 + (5*acos(y/3))/2
fy =
(5*pi)/2 – (5*acos(y/3))/2
(5*pi)/2 + (5*acos(y/3))/2
ymin =
-3*cos(2)
ymax =
-3*cos(2)
Error using ^ (line 442)
Matrix must be square.
Error in Week6classwork1_2 (line 35)
intfy = abs(int(fy^2,ymin,ymax))
Output 2
y = x^(0.5)
Enter the function :
x^(0.5)
fx =
x^(1/2)
Enter minimum value of x :
0
xmin =
0
Enter maximum value of x :
4
xmax =
4
intfx =
8
vx =
8*pi
vx =
25.1327
ans =
‘The volume along x-axis is 2.513274e+01’
y_fx_equation_wrt_x =
y == x^(1/2)
Warning: Solutions are only valid under certain conditions. To include parameters and conditions in the solution, specify the ‘ReturnConditions’ value as ‘true’.
x_fy_equation_wrt_y =
y^2
fy =
y^2
ymin =
0
ymax =
2
intfy =
32/5
vy =
(32*pi)/5
vyy =
20.1062
ans =
‘The volume along y-axis is 2.010619e+01’We have a input function y = f(x) and we have to find the volume along x-axis and y-axis. (solid of revolution) The minimum and maximum values of x are given
I am getting the volume along x-axis but I am getting an error while finding the volume along the y-axis.
The values of f(x) and domain is : –
x^(1/2), 0<=x<=4
3*cos(0.4*x+pi), -5<=x<=5
sin(x)+3, -5<=x<=5
x^3, 0<=x<=3
Here is my code
%Volume along x-axis
clc
clear all
syms x y
%fx = input(‘Enter the function : ‘)
xmin = input(‘Enter minimum value of x : ‘)
xmax = input(‘Enter maximum value of x : ‘)
intfx = int((fx)^2,xmin,xmax)
vx = pi*(intfx)
vx = double(vx)
sprintf(‘The volume along x-axis is %d’,vx)
%Volume along y-axis
y_fx_equation_wrt_x = y == fx
x_fy_equation_wrt_y = solve(y_fx_equation_wrt_x, x)
fy = x_fy_equation_wrt_y
ymin = subs(fx,x,xmin)
ymax = subs(fx,x,xmax)
intfy = abs(int(fy^2,ymin,ymax))
vy = pi*(intfy)
vyy = double(vy)
sprintf(‘The volume along y-axis is %d’,vyy)
In output 1 I get an error but on output 2 I don’t.
What am I doing wrong?
Output 1
y = 3*cos(0.4*x+pi)
3*cos(0.4*x+pi)
fx =
-3*cos((2*x)/5)
Enter minimum value of x :
-5
xmin =
-5
Enter maximum value of x :
5
xmax =
5
intfx =
(45*sin(4))/4 + 45
vx =
pi*((45*sin(4))/4 + 45)
vx =
114.6241
ans =
‘The volume along x-axis is 1.146241e+02’
y_fx_equation_wrt_x =
y == -3*cos((2*x)/5)
x_fy_equation_wrt_y =
(5*pi)/2 – (5*acos(y/3))/2
(5*pi)/2 + (5*acos(y/3))/2
fy =
(5*pi)/2 – (5*acos(y/3))/2
(5*pi)/2 + (5*acos(y/3))/2
ymin =
-3*cos(2)
ymax =
-3*cos(2)
Error using ^ (line 442)
Matrix must be square.
Error in Week6classwork1_2 (line 35)
intfy = abs(int(fy^2,ymin,ymax))
Output 2
y = x^(0.5)
Enter the function :
x^(0.5)
fx =
x^(1/2)
Enter minimum value of x :
0
xmin =
0
Enter maximum value of x :
4
xmax =
4
intfx =
8
vx =
8*pi
vx =
25.1327
ans =
‘The volume along x-axis is 2.513274e+01’
y_fx_equation_wrt_x =
y == x^(1/2)
Warning: Solutions are only valid under certain conditions. To include parameters and conditions in the solution, specify the ‘ReturnConditions’ value as ‘true’.
x_fy_equation_wrt_y =
y^2
fy =
y^2
ymin =
0
ymax =
2
intfy =
32/5
vy =
(32*pi)/5
vyy =
20.1062
ans =
‘The volume along y-axis is 2.010619e+01’ We have a input function y = f(x) and we have to find the volume along x-axis and y-axis. (solid of revolution) The minimum and maximum values of x are given
I am getting the volume along x-axis but I am getting an error while finding the volume along the y-axis.
The values of f(x) and domain is : –
x^(1/2), 0<=x<=4
3*cos(0.4*x+pi), -5<=x<=5
sin(x)+3, -5<=x<=5
x^3, 0<=x<=3
Here is my code
%Volume along x-axis
clc
clear all
syms x y
%fx = input(‘Enter the function : ‘)
xmin = input(‘Enter minimum value of x : ‘)
xmax = input(‘Enter maximum value of x : ‘)
intfx = int((fx)^2,xmin,xmax)
vx = pi*(intfx)
vx = double(vx)
sprintf(‘The volume along x-axis is %d’,vx)
%Volume along y-axis
y_fx_equation_wrt_x = y == fx
x_fy_equation_wrt_y = solve(y_fx_equation_wrt_x, x)
fy = x_fy_equation_wrt_y
ymin = subs(fx,x,xmin)
ymax = subs(fx,x,xmax)
intfy = abs(int(fy^2,ymin,ymax))
vy = pi*(intfy)
vyy = double(vy)
sprintf(‘The volume along y-axis is %d’,vyy)
In output 1 I get an error but on output 2 I don’t.
What am I doing wrong?
Output 1
y = 3*cos(0.4*x+pi)
3*cos(0.4*x+pi)
fx =
-3*cos((2*x)/5)
Enter minimum value of x :
-5
xmin =
-5
Enter maximum value of x :
5
xmax =
5
intfx =
(45*sin(4))/4 + 45
vx =
pi*((45*sin(4))/4 + 45)
vx =
114.6241
ans =
‘The volume along x-axis is 1.146241e+02’
y_fx_equation_wrt_x =
y == -3*cos((2*x)/5)
x_fy_equation_wrt_y =
(5*pi)/2 – (5*acos(y/3))/2
(5*pi)/2 + (5*acos(y/3))/2
fy =
(5*pi)/2 – (5*acos(y/3))/2
(5*pi)/2 + (5*acos(y/3))/2
ymin =
-3*cos(2)
ymax =
-3*cos(2)
Error using ^ (line 442)
Matrix must be square.
Error in Week6classwork1_2 (line 35)
intfy = abs(int(fy^2,ymin,ymax))
Output 2
y = x^(0.5)
Enter the function :
x^(0.5)
fx =
x^(1/2)
Enter minimum value of x :
0
xmin =
0
Enter maximum value of x :
4
xmax =
4
intfx =
8
vx =
8*pi
vx =
25.1327
ans =
‘The volume along x-axis is 2.513274e+01’
y_fx_equation_wrt_x =
y == x^(1/2)
Warning: Solutions are only valid under certain conditions. To include parameters and conditions in the solution, specify the ‘ReturnConditions’ value as ‘true’.
x_fy_equation_wrt_y =
y^2
fy =
y^2
ymin =
0
ymax =
2
intfy =
32/5
vy =
(32*pi)/5
vyy =
20.1062
ans =
‘The volume along y-axis is 2.010619e+01’ solid of revolution, volume along y-axis, volume, how MATLAB Answers — New Questions
BER of OFDM QPSK modulated
Hello every one.
AS i have seen in this website. the BER code of OFDM 16-QAM and OFDM BPSK are there
can anyone provide me a link of BER of OFDM QPSK ..Hello every one.
AS i have seen in this website. the BER code of OFDM 16-QAM and OFDM BPSK are there
can anyone provide me a link of BER of OFDM QPSK .. Hello every one.
AS i have seen in this website. the BER code of OFDM 16-QAM and OFDM BPSK are there
can anyone provide me a link of BER of OFDM QPSK .. ber, ofdm, qpsk MATLAB Answers — New Questions
How to create white noise and pink noise ?
I would like to know how to make pink noise and white noise.
I would also like to know how to put the created noise on the acquired tunnel current z.
I own DSP System Toolbox and Signal Processing Toolbox.
%Parameter Setting
pixel_image = 256; %Input the number of pixels in the image obtained by raster scanning (input 2^n)
dr = 1/(2*sqrt(3)); %Enter dither circle radius [grid].
a_fast_grid = 10; %fast axis scanning range [grid]
a_slow_grid = 10; %Slow axis scanning range [grid]
fm=5000; %Dither circle modulation frequency [Hz]
fs= fm * 240 ; %Sampling frequency [Hz]
f_fast = 10.2; %Input scanning frequency [Hz] (1 line scanning count in 1[s])
start_point_x = 0; %Input x-coordinate of scanning start point (input 1 if you want to move by 1[grid])
start_point_y = 0; %Input y-coordinate of scanning start point (input 1 if you want to move by 1[grid])
%Parameter setting for fast-axis triangular wave
amplitude_fast = a_fast_grid/2; %fast axis amplitude
%Parameter setting for slow-axis triangular wave
amplitude_slow = a_slow_grid/2; %slow axis amplitude
f_slow = (f_fast)/(2*pixel_image); %Slow axis triangular wave frequency
% Generation of time vectors
total_time=256/f_fast; %Total Scan Time
t = linspace(0, total_time, fs * total_time);
x_raster = start_point_x + amplitude_fast*(2/pi)*acos(cos(2*pi*f_fast*t));
y_raster = start_point_y + amplitude_slow*(2/pi)*acos(cos(2*pi*f_slow*t));
x_dither = dr*cos(2*pi*fm*t);
y_dither = dr*sin(2*pi*fm*t);
x = x_raster + x_dither;
y = y_raster + y_dither;
z1 = cos(2*pi*((x-y)/(sqrt(3))));
z2 = cos(2*pi*(2*y/(sqrt(3))));
z3 = cos(2*pi*((x+y)/(sqrt(3))));
z = (z1 + z2 + z3);I would like to know how to make pink noise and white noise.
I would also like to know how to put the created noise on the acquired tunnel current z.
I own DSP System Toolbox and Signal Processing Toolbox.
%Parameter Setting
pixel_image = 256; %Input the number of pixels in the image obtained by raster scanning (input 2^n)
dr = 1/(2*sqrt(3)); %Enter dither circle radius [grid].
a_fast_grid = 10; %fast axis scanning range [grid]
a_slow_grid = 10; %Slow axis scanning range [grid]
fm=5000; %Dither circle modulation frequency [Hz]
fs= fm * 240 ; %Sampling frequency [Hz]
f_fast = 10.2; %Input scanning frequency [Hz] (1 line scanning count in 1[s])
start_point_x = 0; %Input x-coordinate of scanning start point (input 1 if you want to move by 1[grid])
start_point_y = 0; %Input y-coordinate of scanning start point (input 1 if you want to move by 1[grid])
%Parameter setting for fast-axis triangular wave
amplitude_fast = a_fast_grid/2; %fast axis amplitude
%Parameter setting for slow-axis triangular wave
amplitude_slow = a_slow_grid/2; %slow axis amplitude
f_slow = (f_fast)/(2*pixel_image); %Slow axis triangular wave frequency
% Generation of time vectors
total_time=256/f_fast; %Total Scan Time
t = linspace(0, total_time, fs * total_time);
x_raster = start_point_x + amplitude_fast*(2/pi)*acos(cos(2*pi*f_fast*t));
y_raster = start_point_y + amplitude_slow*(2/pi)*acos(cos(2*pi*f_slow*t));
x_dither = dr*cos(2*pi*fm*t);
y_dither = dr*sin(2*pi*fm*t);
x = x_raster + x_dither;
y = y_raster + y_dither;
z1 = cos(2*pi*((x-y)/(sqrt(3))));
z2 = cos(2*pi*(2*y/(sqrt(3))));
z3 = cos(2*pi*((x+y)/(sqrt(3))));
z = (z1 + z2 + z3); I would like to know how to make pink noise and white noise.
I would also like to know how to put the created noise on the acquired tunnel current z.
I own DSP System Toolbox and Signal Processing Toolbox.
%Parameter Setting
pixel_image = 256; %Input the number of pixels in the image obtained by raster scanning (input 2^n)
dr = 1/(2*sqrt(3)); %Enter dither circle radius [grid].
a_fast_grid = 10; %fast axis scanning range [grid]
a_slow_grid = 10; %Slow axis scanning range [grid]
fm=5000; %Dither circle modulation frequency [Hz]
fs= fm * 240 ; %Sampling frequency [Hz]
f_fast = 10.2; %Input scanning frequency [Hz] (1 line scanning count in 1[s])
start_point_x = 0; %Input x-coordinate of scanning start point (input 1 if you want to move by 1[grid])
start_point_y = 0; %Input y-coordinate of scanning start point (input 1 if you want to move by 1[grid])
%Parameter setting for fast-axis triangular wave
amplitude_fast = a_fast_grid/2; %fast axis amplitude
%Parameter setting for slow-axis triangular wave
amplitude_slow = a_slow_grid/2; %slow axis amplitude
f_slow = (f_fast)/(2*pixel_image); %Slow axis triangular wave frequency
% Generation of time vectors
total_time=256/f_fast; %Total Scan Time
t = linspace(0, total_time, fs * total_time);
x_raster = start_point_x + amplitude_fast*(2/pi)*acos(cos(2*pi*f_fast*t));
y_raster = start_point_y + amplitude_slow*(2/pi)*acos(cos(2*pi*f_slow*t));
x_dither = dr*cos(2*pi*fm*t);
y_dither = dr*sin(2*pi*fm*t);
x = x_raster + x_dither;
y = y_raster + y_dither;
z1 = cos(2*pi*((x-y)/(sqrt(3))));
z2 = cos(2*pi*(2*y/(sqrt(3))));
z3 = cos(2*pi*((x+y)/(sqrt(3))));
z = (z1 + z2 + z3); pink noise, white noise, signal processing, matlab, noise, dsp system toolbox, signal processing toolbox MATLAB Answers — New Questions
Are there alternatives to Simulink Real-Time byte packing/unpacking blocks for MacOS?
Hello,
I am working on a project where I need Simulink Real-Time byte packing and unpacking blocks to enable real-time communication via Ethernet with a microcontroller. Unfortunately, this library is not available for macOS.
Does anyone know of any alternative solutions or approaches that could work on macOS?
Thank you in advance for your valuable help!Hello,
I am working on a project where I need Simulink Real-Time byte packing and unpacking blocks to enable real-time communication via Ethernet with a microcontroller. Unfortunately, this library is not available for macOS.
Does anyone know of any alternative solutions or approaches that could work on macOS?
Thank you in advance for your valuable help! Hello,
I am working on a project where I need Simulink Real-Time byte packing and unpacking blocks to enable real-time communication via Ethernet with a microcontroller. Unfortunately, this library is not available for macOS.
Does anyone know of any alternative solutions or approaches that could work on macOS?
Thank you in advance for your valuable help! simulink, byte packing, mac MATLAB Answers — New Questions
How do I know, what simplifying steps MATLAB had taken?
I know that using "simplify" command I can simplify my trignometric matrices. But, can we take output on each simplification step that MATLAB takes to simplify the given expression?
I am trying to simplify this:
if true
% clc
clear all
syms o l1 l2 l0;
A=[ cos(o) -sin(o) 1;
cos(o-(2*pi/3)) -sin(o-(2*pi/3)) 1;
cos(o-(4*pi/3)) -sin(o-(4*pi/3)) 1;]
invA= (2/3)*[cos(o) cos(o-2*pi/3) cos(o-4*pi/3);
-sin(o) -sin(o-2*pi/3) -sin(o-4*pi/3);
0.5 0.5 0.5]
Lss = [l0 + ((l2)*cos(2*o)) (-0.5*l1)+((l2)*cos((2*o)-2*pi/3)) (-0.5*l1)+((l2)*cos((2*o)+2*pi/3));
(-0.5*l1)+((l2)*cos((2*o)-2*pi/3)) l0 + ((l2)*cos(2*(o-2*pi/3))) (-0.5*l1)+((l2)*cos(2*o))
(-0.5*l1)+((l2)*cos((2*o)+2*pi/3)) (-0.5*l1)+((l2)*cos((2*o))) l0 + ((l2)*cos(2*(o-4*pi/3)))]
X=(invA)*(Lss)*(A)
W=simplify(X)
end
and the answer comes to be:
if true
% W =[ l0 + l1/2 + (3*l2)/2, 0, 0]
[ 0, l0 + l1/2 – (3*l2)/2, 0]
[ 0, 0, l0 – l1]
end
which is true. But how do MATLAB got there??I know that using "simplify" command I can simplify my trignometric matrices. But, can we take output on each simplification step that MATLAB takes to simplify the given expression?
I am trying to simplify this:
if true
% clc
clear all
syms o l1 l2 l0;
A=[ cos(o) -sin(o) 1;
cos(o-(2*pi/3)) -sin(o-(2*pi/3)) 1;
cos(o-(4*pi/3)) -sin(o-(4*pi/3)) 1;]
invA= (2/3)*[cos(o) cos(o-2*pi/3) cos(o-4*pi/3);
-sin(o) -sin(o-2*pi/3) -sin(o-4*pi/3);
0.5 0.5 0.5]
Lss = [l0 + ((l2)*cos(2*o)) (-0.5*l1)+((l2)*cos((2*o)-2*pi/3)) (-0.5*l1)+((l2)*cos((2*o)+2*pi/3));
(-0.5*l1)+((l2)*cos((2*o)-2*pi/3)) l0 + ((l2)*cos(2*(o-2*pi/3))) (-0.5*l1)+((l2)*cos(2*o))
(-0.5*l1)+((l2)*cos((2*o)+2*pi/3)) (-0.5*l1)+((l2)*cos((2*o))) l0 + ((l2)*cos(2*(o-4*pi/3)))]
X=(invA)*(Lss)*(A)
W=simplify(X)
end
and the answer comes to be:
if true
% W =[ l0 + l1/2 + (3*l2)/2, 0, 0]
[ 0, l0 + l1/2 – (3*l2)/2, 0]
[ 0, 0, l0 – l1]
end
which is true. But how do MATLAB got there?? I know that using "simplify" command I can simplify my trignometric matrices. But, can we take output on each simplification step that MATLAB takes to simplify the given expression?
I am trying to simplify this:
if true
% clc
clear all
syms o l1 l2 l0;
A=[ cos(o) -sin(o) 1;
cos(o-(2*pi/3)) -sin(o-(2*pi/3)) 1;
cos(o-(4*pi/3)) -sin(o-(4*pi/3)) 1;]
invA= (2/3)*[cos(o) cos(o-2*pi/3) cos(o-4*pi/3);
-sin(o) -sin(o-2*pi/3) -sin(o-4*pi/3);
0.5 0.5 0.5]
Lss = [l0 + ((l2)*cos(2*o)) (-0.5*l1)+((l2)*cos((2*o)-2*pi/3)) (-0.5*l1)+((l2)*cos((2*o)+2*pi/3));
(-0.5*l1)+((l2)*cos((2*o)-2*pi/3)) l0 + ((l2)*cos(2*(o-2*pi/3))) (-0.5*l1)+((l2)*cos(2*o))
(-0.5*l1)+((l2)*cos((2*o)+2*pi/3)) (-0.5*l1)+((l2)*cos((2*o))) l0 + ((l2)*cos(2*(o-4*pi/3)))]
X=(invA)*(Lss)*(A)
W=simplify(X)
end
and the answer comes to be:
if true
% W =[ l0 + l1/2 + (3*l2)/2, 0, 0]
[ 0, l0 + l1/2 – (3*l2)/2, 0]
[ 0, 0, l0 – l1]
end
which is true. But how do MATLAB got there?? simplify, steps, taken, what, how MATLAB Answers — New Questions
Simulink Test: mapping problems when using matrix
hello fellow users,
I request help on the toolbox simulink test, i am using a test harness on a simulink model and one of my entries is a matrix that i want to improt from an Excel however the mapping of the matrix to his root inport is stuck on "Failed to map inputs. Make sure the input port data types match with signal data types specified in the input file. Click here for more information on external input mapping."hello fellow users,
I request help on the toolbox simulink test, i am using a test harness on a simulink model and one of my entries is a matrix that i want to improt from an Excel however the mapping of the matrix to his root inport is stuck on "Failed to map inputs. Make sure the input port data types match with signal data types specified in the input file. Click here for more information on external input mapping." hello fellow users,
I request help on the toolbox simulink test, i am using a test harness on a simulink model and one of my entries is a matrix that i want to improt from an Excel however the mapping of the matrix to his root inport is stuck on "Failed to map inputs. Make sure the input port data types match with signal data types specified in the input file. Click here for more information on external input mapping." simulink test MATLAB Answers — New Questions
How to run a fitlm regression for day of the week dummy variables for financial return data
Hi, I am struggling with how to set up my data to run the fitlm function for day of the week dummy variables.
My data that I have set up in a (2500,6) matrix where C1 is the returns data and C2:C6 are column vectors of zeros and ones where C2 – 1 is for Monday C3 – 1 represents tuesday and so on.
My reults are as follows:
Fitlm:
-1.31153554169770 0.953057779050930 -1.37613434413573 0.169037651868845
-0.131905728387301 0.0695763306138066 -1.89584197993226 0.0582218112735167
0.0843907252336952 0.0872037277677016 0.967742175638410 0.333368798643977
0 0 NaN NaN
-0.0247423867293685 0.0984537148158696 -0.251309834023453 0.801617743803277
0.169341528221423 0.0952957370120605 1.77701053091169 0.0758206160733013
0.460051465197619 0.0967773549107878 4.75370984897974 2.23973346792996e-06
How do i correct my input to replace this row of Nan values?Hi, I am struggling with how to set up my data to run the fitlm function for day of the week dummy variables.
My data that I have set up in a (2500,6) matrix where C1 is the returns data and C2:C6 are column vectors of zeros and ones where C2 – 1 is for Monday C3 – 1 represents tuesday and so on.
My reults are as follows:
Fitlm:
-1.31153554169770 0.953057779050930 -1.37613434413573 0.169037651868845
-0.131905728387301 0.0695763306138066 -1.89584197993226 0.0582218112735167
0.0843907252336952 0.0872037277677016 0.967742175638410 0.333368798643977
0 0 NaN NaN
-0.0247423867293685 0.0984537148158696 -0.251309834023453 0.801617743803277
0.169341528221423 0.0952957370120605 1.77701053091169 0.0758206160733013
0.460051465197619 0.0967773549107878 4.75370984897974 2.23973346792996e-06
How do i correct my input to replace this row of Nan values? Hi, I am struggling with how to set up my data to run the fitlm function for day of the week dummy variables.
My data that I have set up in a (2500,6) matrix where C1 is the returns data and C2:C6 are column vectors of zeros and ones where C2 – 1 is for Monday C3 – 1 represents tuesday and so on.
My reults are as follows:
Fitlm:
-1.31153554169770 0.953057779050930 -1.37613434413573 0.169037651868845
-0.131905728387301 0.0695763306138066 -1.89584197993226 0.0582218112735167
0.0843907252336952 0.0872037277677016 0.967742175638410 0.333368798643977
0 0 NaN NaN
-0.0247423867293685 0.0984537148158696 -0.251309834023453 0.801617743803277
0.169341528221423 0.0952957370120605 1.77701053091169 0.0758206160733013
0.460051465197619 0.0967773549107878 4.75370984897974 2.23973346792996e-06
How do i correct my input to replace this row of Nan values? fitlm, regress, dummy variables, dummyvar, regression, nan, financial returns, financial time series, stocks, stock returns MATLAB Answers — New Questions
‘m_map’ Conversion of longitude and latitude coordinates to xy coordinates.
the range of longitude[110 130] latitude[35 42.2]
How to correspond to xy coordinates.x[1 300] y[1 300]
I want to assign values to each coordinate point, so please help me.the range of longitude[110 130] latitude[35 42.2]
How to correspond to xy coordinates.x[1 300] y[1 300]
I want to assign values to each coordinate point, so please help me. the range of longitude[110 130] latitude[35 42.2]
How to correspond to xy coordinates.x[1 300] y[1 300]
I want to assign values to each coordinate point, so please help me. m_map MATLAB Answers — New Questions
