I have an original image of dimension 300x300x3 (RGB)
after removing some entries, I apply an algorithm to reconstuct the original image.
Now i want to find the relative error between the 2 images.

….
% I call my function norm_fro to calcuate the error
Erec(i)= norm_fro( X_origin , X_r ecovered);
….

% here is my norm_fro function
function f = norm_fro( X , Xhat )

f = norm(X -Xhat,’fro’)^2/norm(X,’fro’)^2;

end

I get this error
Error using norm
Input must be 2-D.

Error in norm_fro (line 11)
f = norm(X -Xhat,’fro’)^2/norm(X,’fro’)^2;I have an original image of dimension 300x300x3 (RGB)
after removing some entries, I apply an algorithm to reconstuct the original image.
Now i want to find the relative error between the 2 images.

….
% I call my function norm_fro to calcuate the error
Erec(i)= norm_fro( X_origin , X_r ecovered);
….

% here is my norm_fro function
function f = norm_fro( X , Xhat )

f = norm(X -Xhat,’fro’)^2/norm(X,’fro’)^2;

end

I get this error
Error using norm
Input must be 2-D.

Error in norm_fro (line 11)
f = norm(X -Xhat,’fro’)^2/norm(X,’fro’)^2; I have an original image of dimension 300x300x3 (RGB)
after removing some entries, I apply an algorithm to reconstuct the original image.
Now i want to find the relative error between the 2 images.

….
% I call my function norm_fro to calcuate the error
Erec(i)= norm_fro( X_origin , X_r ecovered);
….

% here is my norm_fro function
function f = norm_fro( X , Xhat )

f = norm(X -Xhat,’fro’)^2/norm(X,’fro’)^2;

end

I get this error
Error using norm
Input must be 2-D.

Error in norm_fro (line 11)
f = norm(X -Xhat,’fro’)^2/norm(X,’fro’)^2; error, image processing, image analysis MATLAB Answers — New Questions

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Hello all,
While I was doing my homework I have stucked at here. I have imported an excel file into matlab and the excel file consist of values such as Gender,Age,Weight,Smoking Status and Average Blood Pressure. I need to define these following two questions but I cant find out how to put it in a matlab function. Questions are,
1- What is the blood pressure of a 45-year-old, 75 kg male smoking cigarette?
2- What is the blood pressure of a 38-year-old non-smoker woman weighing 60 kg?
Any help is appreciated,Hello all,
While I was doing my homework I have stucked at here. I have imported an excel file into matlab and the excel file consist of values such as Gender,Age,Weight,Smoking Status and Average Blood Pressure. I need to define these following two questions but I cant find out how to put it in a matlab function. Questions are,
1- What is the blood pressure of a 45-year-old, 75 kg male smoking cigarette?
2- What is the blood pressure of a 38-year-old non-smoker woman weighing 60 kg?
Any help is appreciated, Hello all,
While I was doing my homework I have stucked at here. I have imported an excel file into matlab and the excel file consist of values such as Gender,Age,Weight,Smoking Status and Average Blood Pressure. I need to define these following two questions but I cant find out how to put it in a matlab function. Questions are,
1- What is the blood pressure of a 45-year-old, 75 kg male smoking cigarette?
2- What is the blood pressure of a 38-year-old non-smoker woman weighing 60 kg?
Any help is appreciated, importing excel data, blood pressure, smoking MATLAB Answers — New Questions

​

I am running a parsim simulation for a simulink model in R2023B. Here, I experience single workers getting stuck in the simulation, during compilation or in a ‘queued’ state, some of these later aborting the simulation.
For exploratory simulation, it is not necessary for my simulation run to have every simulation successfully run, I can tolerate a few fails for overall speed gain.
So, my idea would be to set a timeout for each simulation and prematurely stop the simulation, ideally with a timeout error for later processing, if the overall worker occupation of a single run exceeds a set time. This should include queueing and compilation.
I have found this related article on stopping the whole pool using a postSimFunction, and plan to use this to evaluate the run time of each other worker after one simulation has finished, stopping these that take too long.
However, I fail to measure single worker duration and aborting a single simulation on a worker from this postSimfunction. Are there any good ways on how to do that?
If that cannot be done, is it possible to place some form or real-time clock in a simulink simulation to detect simulation duration and finish the simulation based on that criterion?
Thank you for your help.I am running a parsim simulation for a simulink model in R2023B. Here, I experience single workers getting stuck in the simulation, during compilation or in a ‘queued’ state, some of these later aborting the simulation.
For exploratory simulation, it is not necessary for my simulation run to have every simulation successfully run, I can tolerate a few fails for overall speed gain.
So, my idea would be to set a timeout for each simulation and prematurely stop the simulation, ideally with a timeout error for later processing, if the overall worker occupation of a single run exceeds a set time. This should include queueing and compilation.
I have found this related article on stopping the whole pool using a postSimFunction, and plan to use this to evaluate the run time of each other worker after one simulation has finished, stopping these that take too long.
However, I fail to measure single worker duration and aborting a single simulation on a worker from this postSimfunction. Are there any good ways on how to do that?
If that cannot be done, is it possible to place some form or real-time clock in a simulink simulation to detect simulation duration and finish the simulation based on that criterion?
Thank you for your help. I am running a parsim simulation for a simulink model in R2023B. Here, I experience single workers getting stuck in the simulation, during compilation or in a ‘queued’ state, some of these later aborting the simulation.
For exploratory simulation, it is not necessary for my simulation run to have every simulation successfully run, I can tolerate a few fails for overall speed gain.
So, my idea would be to set a timeout for each simulation and prematurely stop the simulation, ideally with a timeout error for later processing, if the overall worker occupation of a single run exceeds a set time. This should include queueing and compilation.
I have found this related article on stopping the whole pool using a postSimFunction, and plan to use this to evaluate the run time of each other worker after one simulation has finished, stopping these that take too long.
However, I fail to measure single worker duration and aborting a single simulation on a worker from this postSimfunction. Are there any good ways on how to do that?
If that cannot be done, is it possible to place some form or real-time clock in a simulink simulation to detect simulation duration and finish the simulation based on that criterion?
Thank you for your help. parallel computing, simulation control MATLAB Answers — New Questions

​

I am trying to get real-time data from simulink model (rtl-sdr receiver) and display it on gui, so I am using `add_exec_event_listener` in Simulink model callback as written here: https://www.mathworks.com/matlabcentral/answers/446302-how-do-i-update-a-gui-designed-in-app-designer-with-data-from-a-running-simulink-model
Interaction with model based on Simulink Compiler functions, e.g. creation a SimulationInput object and simulink.compiler.configureForDeployment.
The problem is that I get an error when the line below is executed:
out=sim(in)
Full text of an error:
Error evaluating ‘StartFcn’ callback of block_diagram ‘gsmAdGui2’.
Callback string is ‘blk = ‘gsmAdGui2/Gain’;
event = ‘PostOutputs’;
listener = @(app, event) updateGUI(hApp);
h = add_exec_event_listener(blk, event, listener);
Caused by:
Error using Simulink.Simulation.internal.DesktopSimHelper
Adding a listener for a block method execution event for ‘gsmAdGui2/Gain’ is not supported. Listeners can be added only when block diagram is executing.
I don’t understand what should I do to correctly attach the listener to a gain block (because it cannot be attached directly to a rtl-sdr). Thank for any help.
Here is main callback function:
function StartButtonPushed(app, event)
app.StartButton.Enable = ‘off’;
app.StopButton.Enable = ‘on’;
app.SamplingRate=app.SampRateEditField.Value;
%Create a SimulationInput object for this model
in=Simulink.SimulationInput(app.modelName);
in=in.setModelParameter(‘StartTime’,’0.01′,’StopTime’, num2str(app.StopTimeEditField.Value));
in = in.setVariable(‘sdrGain’, app.GainEditField.Value);
in = in.setVariable(‘fc’, app.CenterFreqEditField.Value);
in = in.setVariable(‘sampRate’, app.SamplingRate);
in.applyToModel;
in=simulink.compiler.configureForDeployment(in);
out=sim(in);%запуск симуляции
app.StartButton.Enable = ‘on’;
app.StopButton.Enable = ‘off’;
end
Here is updateGUI function that receives real-time data from model:
function updateGUI(app, varargin) %plots fft of received 2048 samples per frame iq stream
% Create an object that gets the run-time value of the specified block
rto = get_param([bdroot,’/Gain’],’RuntimeObject’);
% Update the GUI accordingly
currentTime = rto.CurrentTime;
app.SimTime.Text = num2str(currentTime);
sdrData = rto.InputPort(1).Data;
sdrData=sdrData.*app.W; % hamming window
sdrFft = fftshift(fft(sdrData));
sdrFft=20*log10((abs(sdrFft))/2048);
plot(app.UIAxes, app.freqvec, sdrFft,’b’);
end
Here is model InitFcn: hApp = sdrAdGui8 %name of an app
Here is model StartFcn:
blk = ‘gsmAdGui2/Gain’; %block to listen
event = ‘PostOutputs’;
listener = @(app, event) updateGUI(hApp);
h = add_exec_event_listener(blk, event, listener);I am trying to get real-time data from simulink model (rtl-sdr receiver) and display it on gui, so I am using `add_exec_event_listener` in Simulink model callback as written here: https://www.mathworks.com/matlabcentral/answers/446302-how-do-i-update-a-gui-designed-in-app-designer-with-data-from-a-running-simulink-model
Interaction with model based on Simulink Compiler functions, e.g. creation a SimulationInput object and simulink.compiler.configureForDeployment.
The problem is that I get an error when the line below is executed:
out=sim(in)
Full text of an error:
Error evaluating ‘StartFcn’ callback of block_diagram ‘gsmAdGui2’.
Callback string is ‘blk = ‘gsmAdGui2/Gain’;
event = ‘PostOutputs’;
listener = @(app, event) updateGUI(hApp);
h = add_exec_event_listener(blk, event, listener);
Caused by:
Error using Simulink.Simulation.internal.DesktopSimHelper
Adding a listener for a block method execution event for ‘gsmAdGui2/Gain’ is not supported. Listeners can be added only when block diagram is executing.
I don’t understand what should I do to correctly attach the listener to a gain block (because it cannot be attached directly to a rtl-sdr). Thank for any help.
Here is main callback function:
function StartButtonPushed(app, event)
app.StartButton.Enable = ‘off’;
app.StopButton.Enable = ‘on’;
app.SamplingRate=app.SampRateEditField.Value;
%Create a SimulationInput object for this model
in=Simulink.SimulationInput(app.modelName);
in=in.setModelParameter(‘StartTime’,’0.01′,’StopTime’, num2str(app.StopTimeEditField.Value));
in = in.setVariable(‘sdrGain’, app.GainEditField.Value);
in = in.setVariable(‘fc’, app.CenterFreqEditField.Value);
in = in.setVariable(‘sampRate’, app.SamplingRate);
in.applyToModel;
in=simulink.compiler.configureForDeployment(in);
out=sim(in);%запуск симуляции
app.StartButton.Enable = ‘on’;
app.StopButton.Enable = ‘off’;
end
Here is updateGUI function that receives real-time data from model:
function updateGUI(app, varargin) %plots fft of received 2048 samples per frame iq stream
% Create an object that gets the run-time value of the specified block
rto = get_param([bdroot,’/Gain’],’RuntimeObject’);
% Update the GUI accordingly
currentTime = rto.CurrentTime;
app.SimTime.Text = num2str(currentTime);
sdrData = rto.InputPort(1).Data;
sdrData=sdrData.*app.W; % hamming window
sdrFft = fftshift(fft(sdrData));
sdrFft=20*log10((abs(sdrFft))/2048);
plot(app.UIAxes, app.freqvec, sdrFft,’b’);
end
Here is model InitFcn: hApp = sdrAdGui8 %name of an app
Here is model StartFcn:
blk = ‘gsmAdGui2/Gain’; %block to listen
event = ‘PostOutputs’;
listener = @(app, event) updateGUI(hApp);
h = add_exec_event_listener(blk, event, listener); I am trying to get real-time data from simulink model (rtl-sdr receiver) and display it on gui, so I am using `add_exec_event_listener` in Simulink model callback as written here: https://www.mathworks.com/matlabcentral/answers/446302-how-do-i-update-a-gui-designed-in-app-designer-with-data-from-a-running-simulink-model
Interaction with model based on Simulink Compiler functions, e.g. creation a SimulationInput object and simulink.compiler.configureForDeployment.
The problem is that I get an error when the line below is executed:
out=sim(in)
Full text of an error:
Error evaluating ‘StartFcn’ callback of block_diagram ‘gsmAdGui2’.
Callback string is ‘blk = ‘gsmAdGui2/Gain’;
event = ‘PostOutputs’;
listener = @(app, event) updateGUI(hApp);
h = add_exec_event_listener(blk, event, listener);
Caused by:
Error using Simulink.Simulation.internal.DesktopSimHelper
Adding a listener for a block method execution event for ‘gsmAdGui2/Gain’ is not supported. Listeners can be added only when block diagram is executing.
I don’t understand what should I do to correctly attach the listener to a gain block (because it cannot be attached directly to a rtl-sdr). Thank for any help.
Here is main callback function:
function StartButtonPushed(app, event)
app.StartButton.Enable = ‘off’;
app.StopButton.Enable = ‘on’;
app.SamplingRate=app.SampRateEditField.Value;
%Create a SimulationInput object for this model
in=Simulink.SimulationInput(app.modelName);
in=in.setModelParameter(‘StartTime’,’0.01′,’StopTime’, num2str(app.StopTimeEditField.Value));
in = in.setVariable(‘sdrGain’, app.GainEditField.Value);
in = in.setVariable(‘fc’, app.CenterFreqEditField.Value);
in = in.setVariable(‘sampRate’, app.SamplingRate);
in.applyToModel;
in=simulink.compiler.configureForDeployment(in);
out=sim(in);%запуск симуляции
app.StartButton.Enable = ‘on’;
app.StopButton.Enable = ‘off’;
end
Here is updateGUI function that receives real-time data from model:
function updateGUI(app, varargin) %plots fft of received 2048 samples per frame iq stream
% Create an object that gets the run-time value of the specified block
rto = get_param([bdroot,’/Gain’],’RuntimeObject’);
% Update the GUI accordingly
currentTime = rto.CurrentTime;
app.SimTime.Text = num2str(currentTime);
sdrData = rto.InputPort(1).Data;
sdrData=sdrData.*app.W; % hamming window
sdrFft = fftshift(fft(sdrData));
sdrFft=20*log10((abs(sdrFft))/2048);
plot(app.UIAxes, app.freqvec, sdrFft,’b’);
end
Here is model InitFcn: hApp = sdrAdGui8 %name of an app
Here is model StartFcn:
blk = ‘gsmAdGui2/Gain’; %block to listen
event = ‘PostOutputs’;
listener = @(app, event) updateGUI(hApp);
h = add_exec_event_listener(blk, event, listener); app designer, gui, event listener, simulink compiler MATLAB Answers — New Questions

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Hallo Everyone,
I needed a help in creating a data structure. I am new to this platform. it would be helpful if someones guides me through giving information or an example. I have a set of data’s in an excel sheet. I need to create a data structure of it. I have set of turbines(1-5) each are having its own respective towers(1-10) having some field names. If i need to add a field name in any of my tower it should update the turbine too. How can i create a data structure for it. Thank you.
Its in the form of tree.Hallo Everyone,
I needed a help in creating a data structure. I am new to this platform. it would be helpful if someones guides me through giving information or an example. I have a set of data’s in an excel sheet. I need to create a data structure of it. I have set of turbines(1-5) each are having its own respective towers(1-10) having some field names. If i need to add a field name in any of my tower it should update the turbine too. How can i create a data structure for it. Thank you.
Its in the form of tree. Hallo Everyone,
I needed a help in creating a data structure. I am new to this platform. it would be helpful if someones guides me through giving information or an example. I have a set of data’s in an excel sheet. I need to create a data structure of it. I have set of turbines(1-5) each are having its own respective towers(1-10) having some field names. If i need to add a field name in any of my tower it should update the turbine too. How can i create a data structure for it. Thank you.
Its in the form of tree. data structure, structures MATLAB Answers — New Questions

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As a university student, I was wondering if it was possible to download the Projects at the end of every Self-Paced Course, or if they are only available online during the Courses. I hope this is not a silly question, and thank you to anyone who responds.As a university student, I was wondering if it was possible to download the Projects at the end of every Self-Paced Course, or if they are only available online during the Courses. I hope this is not a silly question, and thank you to anyone who responds. As a university student, I was wondering if it was possible to download the Projects at the end of every Self-Paced Course, or if they are only available online during the Courses. I hope this is not a silly question, and thank you to anyone who responds. courses, download, self-paced, projects, online, online_training, distance_learning MATLAB Answers — New Questions

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I am trying to find energy of an image using co occurrence matrix. Is this code correct? Is the method of calculating gray level co occurrence matrix correct?

offsets = [ 0 1; -1 1; -1 0; -1 -1];

T(i).energy = 0; %initial energy of image (T(i)) is 0

Imag = T(i).data; %Reading image into Imag
glcm = graycomatrix(Imag,’Of’,offsets); %calculating gray level co-occurrence matrix
glcm
[r c] = size(glcm);
for ctr=1:1:r
for ctr2=1:1:c
T(i).energy = T(i).energy+(glcm(ctr,ctr)).^2;
end
end
fprintf(‘energy is %linn’,T(i).energy);I am trying to find energy of an image using co occurrence matrix. Is this code correct? Is the method of calculating gray level co occurrence matrix correct?

offsets = [ 0 1; -1 1; -1 0; -1 -1];

T(i).energy = 0; %initial energy of image (T(i)) is 0

Imag = T(i).data; %Reading image into Imag
glcm = graycomatrix(Imag,’Of’,offsets); %calculating gray level co-occurrence matrix
glcm
[r c] = size(glcm);
for ctr=1:1:r
for ctr2=1:1:c
T(i).energy = T(i).energy+(glcm(ctr,ctr)).^2;
end
end
fprintf(‘energy is %linn’,T(i).energy); I am trying to find energy of an image using co occurrence matrix. Is this code correct? Is the method of calculating gray level co occurrence matrix correct?

offsets = [ 0 1; -1 1; -1 0; -1 -1];

T(i).energy = 0; %initial energy of image (T(i)) is 0

Imag = T(i).data; %Reading image into Imag
glcm = graycomatrix(Imag,’Of’,offsets); %calculating gray level co-occurrence matrix
glcm
[r c] = size(glcm);
for ctr=1:1:r
for ctr2=1:1:c
T(i).energy = T(i).energy+(glcm(ctr,ctr)).^2;
end
end
fprintf(‘energy is %linn’,T(i).energy); regards MATLAB Answers — New Questions

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I have a satellite data values stored in a .dat file of almost 900 MB. The data is in the form of int8. I want to read as much data as possible from the start and then pass it in a function argument and then save the new signal in a separate file. I have used importdata but it cant work and unable to read large data file. Is there any other way which I can use to read data in chunks and put them together afterwards? Anyone please help me out. Its very important that I read this data.

The specifications of software, platform & PC are:

Matlab R2015a. Windows 7 64-bit, Core i5 1st Gen., 4 GB RAM, 250 of hard Disk SpaceI have a satellite data values stored in a .dat file of almost 900 MB. The data is in the form of int8. I want to read as much data as possible from the start and then pass it in a function argument and then save the new signal in a separate file. I have used importdata but it cant work and unable to read large data file. Is there any other way which I can use to read data in chunks and put them together afterwards? Anyone please help me out. Its very important that I read this data.

The specifications of software, platform & PC are:

Matlab R2015a. Windows 7 64-bit, Core i5 1st Gen., 4 GB RAM, 250 of hard Disk Space I have a satellite data values stored in a .dat file of almost 900 MB. The data is in the form of int8. I want to read as much data as possible from the start and then pass it in a function argument and then save the new signal in a separate file. I have used importdata but it cant work and unable to read large data file. Is there any other way which I can use to read data in chunks and put them together afterwards? Anyone please help me out. Its very important that I read this data.

The specifications of software, platform & PC are:

Matlab R2015a. Windows 7 64-bit, Core i5 1st Gen., 4 GB RAM, 250 of hard Disk Space large data, import data file, .dat MATLAB Answers — New Questions

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I want to create an environment for an agent using vehicular network or route based. How can i create ?I want to create an environment for an agent using vehicular network or route based. How can i create ? I want to create an environment for an agent using vehicular network or route based. How can i create ? matlab, vehicular network, route MATLAB Answers — New Questions

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after installing matlab 2016a , it display license manager error -8error -8 .so would you help meafter installing matlab 2016a , it display license manager error -8error -8 .so would you help me after installing matlab 2016a , it display license manager error -8error -8 .so would you help me error -8 MATLAB Answers — New Questions

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