I am plottting a simple sst difference plot. My lon data is in the range -180 to 180. I have converted it to 0 to 360. After plotting I am geeting these black patches (attached).
clear
clc

% Define the file paths for WeakTEJYears
WeakTEJYears = {
‘F:SST_MA1979.nc’
‘F:SST_MA1983.nc’
‘F:SST_MA1987.nc’
‘F:SST_MA1997.nc’
‘F:SST_MA2002.nc’
‘F:SST_MA2015.nc’
‘F:SST_MA2023.nc’
};

% Define the file paths for StrongTEJYears
StrongTEJYears = {
‘F:SST_MA1985.nc’
‘F:SST_MA1988.nc’
‘F:SST_MA1999.nc’
‘F:SST_MA2009.nc’
‘F:SST_MA2013.nc’
};

% Initialize variables to store the sum of SST data
sst_sum_weak = 0;
sst_sum_strong = 0;

num_weak_files = length(WeakTEJYears);
num_strong_files = length(StrongTEJYears);

lat_min = -25;
lat_max = 70;
lon_min = 0;
lon_max = 360;

for i = 1:num_weak_files
ncfile = WeakTEJYears{i};

latitude = ncread(ncfile, ‘latitude’);
longitude = ncread(ncfile, ‘longitude’);

longitude(longitude < 0) = longitude(longitude < 0) + 360;

[longitude, sort_idx] = sort(longitude);

sst = ncread(ncfile, ‘sst’);
sst_sorted = sst(sort_idx, :, :); % Re-sort SST data according to longitude sorting

lat_idx = find(latitude >= lat_min & latitude <= lat_max);
lon_idx = find(longitude >= lon_min & longitude <= lon_max);

sst_region = sst_sorted(lon_idx, lat_idx, :);

sst_sum_weak = sst_sum_weak + mean(sst_region, 3); % Mean over time
end

for i = 1:num_strong_files
ncfile = StrongTEJYears{i};

latitude = ncread(ncfile, ‘latitude’);
longitude = ncread(ncfile, ‘longitude’);

longitude(longitude < 0) = longitude(longitude < 0) + 360;

[longitude, sort_idx] = sort(longitude);

sst = ncread(ncfile, ‘sst’);
sst_sorted = sst(sort_idx, :, :);

lat_idx = find(latitude >= lat_min & latitude <= lat_max);
lon_idx = find(longitude >= lon_min & longitude <= lon_max);

sst_region = sst_sorted(lon_idx, lat_idx, :);

sst_sum_strong = sst_sum_strong + mean(sst_region, 3); % Mean over time
end

sst_avg_weak = sst_sum_weak / num_weak_files;
sst_avg_strong = sst_sum_strong / num_strong_files;

sst_diff = sst_avg_strong – sst_avg_weak;

figure;
[lon_mesh, lat_mesh] = meshgrid(longitude(lon_idx), latitude(lat_idx));

contourf(lon_mesh, lat_mesh, sst_diff’, 20, ‘EdgeColor’, ‘none’);
colormap jet;
colorbar;
caxis([-2, 2]);
c.Label.String = ‘Temperature (K)’;
c.Label.FontSize = 18;
c.Label.FontWeight = ‘bold’;

coast = load(‘coastlines’);

coastlon = coast.coastlon;
coastlat = coast.coastlat;
coastlon(coastlon < 0) = coastlon(coastlon < 0) + 360;

hold on;
plot(coastlon, coastlat, ‘k’, ‘LineWidth’, 1.5);

xlim([lon_min, lon_max]);
ylim([lat_min, lat_max]);

title(‘Difference: Strong – Weak TEJ Average SST’, ‘FontSize’, 14);I am plottting a simple sst difference plot. My lon data is in the range -180 to 180. I have converted it to 0 to 360. After plotting I am geeting these black patches (attached).
clear
clc

% Define the file paths for WeakTEJYears
WeakTEJYears = {
‘F:SST_MA1979.nc’
‘F:SST_MA1983.nc’
‘F:SST_MA1987.nc’
‘F:SST_MA1997.nc’
‘F:SST_MA2002.nc’
‘F:SST_MA2015.nc’
‘F:SST_MA2023.nc’
};

% Define the file paths for StrongTEJYears
StrongTEJYears = {
‘F:SST_MA1985.nc’
‘F:SST_MA1988.nc’
‘F:SST_MA1999.nc’
‘F:SST_MA2009.nc’
‘F:SST_MA2013.nc’
};

% Initialize variables to store the sum of SST data
sst_sum_weak = 0;
sst_sum_strong = 0;

num_weak_files = length(WeakTEJYears);
num_strong_files = length(StrongTEJYears);

lat_min = -25;
lat_max = 70;
lon_min = 0;
lon_max = 360;

for i = 1:num_weak_files
ncfile = WeakTEJYears{i};

latitude = ncread(ncfile, ‘latitude’);
longitude = ncread(ncfile, ‘longitude’);

longitude(longitude < 0) = longitude(longitude < 0) + 360;

[longitude, sort_idx] = sort(longitude);

sst = ncread(ncfile, ‘sst’);
sst_sorted = sst(sort_idx, :, :); % Re-sort SST data according to longitude sorting

lat_idx = find(latitude >= lat_min & latitude <= lat_max);
lon_idx = find(longitude >= lon_min & longitude <= lon_max);

sst_region = sst_sorted(lon_idx, lat_idx, :);

sst_sum_weak = sst_sum_weak + mean(sst_region, 3); % Mean over time
end

for i = 1:num_strong_files
ncfile = StrongTEJYears{i};

latitude = ncread(ncfile, ‘latitude’);
longitude = ncread(ncfile, ‘longitude’);

longitude(longitude < 0) = longitude(longitude < 0) + 360;

[longitude, sort_idx] = sort(longitude);

sst = ncread(ncfile, ‘sst’);
sst_sorted = sst(sort_idx, :, :);

lat_idx = find(latitude >= lat_min & latitude <= lat_max);
lon_idx = find(longitude >= lon_min & longitude <= lon_max);

sst_region = sst_sorted(lon_idx, lat_idx, :);

sst_sum_strong = sst_sum_strong + mean(sst_region, 3); % Mean over time
end

sst_avg_weak = sst_sum_weak / num_weak_files;
sst_avg_strong = sst_sum_strong / num_strong_files;

sst_diff = sst_avg_strong – sst_avg_weak;

figure;
[lon_mesh, lat_mesh] = meshgrid(longitude(lon_idx), latitude(lat_idx));

contourf(lon_mesh, lat_mesh, sst_diff’, 20, ‘EdgeColor’, ‘none’);
colormap jet;
colorbar;
caxis([-2, 2]);
c.Label.String = ‘Temperature (K)’;
c.Label.FontSize = 18;
c.Label.FontWeight = ‘bold’;

coast = load(‘coastlines’);

coastlon = coast.coastlon;
coastlat = coast.coastlat;
coastlon(coastlon < 0) = coastlon(coastlon < 0) + 360;

hold on;
plot(coastlon, coastlat, ‘k’, ‘LineWidth’, 1.5);

xlim([lon_min, lon_max]);
ylim([lat_min, lat_max]);

title(‘Difference: Strong – Weak TEJ Average SST’, ‘FontSize’, 14); I am plottting a simple sst difference plot. My lon data is in the range -180 to 180. I have converted it to 0 to 360. After plotting I am geeting these black patches (attached).
clear
clc

% Define the file paths for WeakTEJYears
WeakTEJYears = {
‘F:SST_MA1979.nc’
‘F:SST_MA1983.nc’
‘F:SST_MA1987.nc’
‘F:SST_MA1997.nc’
‘F:SST_MA2002.nc’
‘F:SST_MA2015.nc’
‘F:SST_MA2023.nc’
};

% Define the file paths for StrongTEJYears
StrongTEJYears = {
‘F:SST_MA1985.nc’
‘F:SST_MA1988.nc’
‘F:SST_MA1999.nc’
‘F:SST_MA2009.nc’
‘F:SST_MA2013.nc’
};

% Initialize variables to store the sum of SST data
sst_sum_weak = 0;
sst_sum_strong = 0;

num_weak_files = length(WeakTEJYears);
num_strong_files = length(StrongTEJYears);

lat_min = -25;
lat_max = 70;
lon_min = 0;
lon_max = 360;

for i = 1:num_weak_files
ncfile = WeakTEJYears{i};

latitude = ncread(ncfile, ‘latitude’);
longitude = ncread(ncfile, ‘longitude’);

longitude(longitude < 0) = longitude(longitude < 0) + 360;

[longitude, sort_idx] = sort(longitude);

sst = ncread(ncfile, ‘sst’);
sst_sorted = sst(sort_idx, :, :); % Re-sort SST data according to longitude sorting

lat_idx = find(latitude >= lat_min & latitude <= lat_max);
lon_idx = find(longitude >= lon_min & longitude <= lon_max);

sst_region = sst_sorted(lon_idx, lat_idx, :);

sst_sum_weak = sst_sum_weak + mean(sst_region, 3); % Mean over time
end

for i = 1:num_strong_files
ncfile = StrongTEJYears{i};

latitude = ncread(ncfile, ‘latitude’);
longitude = ncread(ncfile, ‘longitude’);

longitude(longitude < 0) = longitude(longitude < 0) + 360;

[longitude, sort_idx] = sort(longitude);

sst = ncread(ncfile, ‘sst’);
sst_sorted = sst(sort_idx, :, :);

lat_idx = find(latitude >= lat_min & latitude <= lat_max);
lon_idx = find(longitude >= lon_min & longitude <= lon_max);

sst_region = sst_sorted(lon_idx, lat_idx, :);

sst_sum_strong = sst_sum_strong + mean(sst_region, 3); % Mean over time
end

sst_avg_weak = sst_sum_weak / num_weak_files;
sst_avg_strong = sst_sum_strong / num_strong_files;

sst_diff = sst_avg_strong – sst_avg_weak;

figure;
[lon_mesh, lat_mesh] = meshgrid(longitude(lon_idx), latitude(lat_idx));

contourf(lon_mesh, lat_mesh, sst_diff’, 20, ‘EdgeColor’, ‘none’);
colormap jet;
colorbar;
caxis([-2, 2]);
c.Label.String = ‘Temperature (K)’;
c.Label.FontSize = 18;
c.Label.FontWeight = ‘bold’;

coast = load(‘coastlines’);

coastlon = coast.coastlon;
coastlat = coast.coastlat;
coastlon(coastlon < 0) = coastlon(coastlon < 0) + 360;

hold on;
plot(coastlon, coastlat, ‘k’, ‘LineWidth’, 1.5);

xlim([lon_min, lon_max]);
ylim([lat_min, lat_max]);

title(‘Difference: Strong – Weak TEJ Average SST’, ‘FontSize’, 14); spatial map, image analysis, matrix manipulation MATLAB Answers — New Questions

​

Hi, All —
I would like to compute the average curvature of a closed 3D surface for which I know the inside-outside function, F(x,y,z)=0. (FWIW, centered on the origin and symmetric about all three Cartesian axes.)
I have implemented a couple of different approaches for Gaussian and mean curvature using divergence, the Hessian, the first and second fundamental forms, and other approaches of which I have a similarly weak grasp. I am generally able to get things to work for degenrate cases (e.g., a sphere), but if I increase the complexity of my object, I am tending to get answers that imply I am flirting with the precipice of numerical instability (e.g., imaginary results where Re(x)/Im(x)~10^8).
I like the idea of this approach because it "feels clean": (1) use continuous function; (2) apply magic; (3) integrate in spherical coordinates; and (4) profit. However, I am beginning to think that I need to tune out the sires sweetly singing and go for a more practical (i.e., tractable) approach.
My other idea is to start by using the inside-outside function to generate [X,Y,Z] similar to what is used by surf(). I can then use surfature() from the FEX to get the curvatures at every point on my [X,Y,Z] mesh. Finally, I could convert everything to spherical coordinates and integrate the curvature arrays to get average values.
My concern here is that reregularly-spaced [X,Y,Z] does not translate to regularly-spaced [r,theta,phi], so the calculation is somehow pathologically biased. I am also unsure about how to do the actual integration after converting my array to spherical coordinates.
Apologies for such a long text-dense question. I thought about trying to illustrate this better with a couple of code snippets, but the algebra is really messy and not all that informative.
Thanks, in advance.Hi, All —
I would like to compute the average curvature of a closed 3D surface for which I know the inside-outside function, F(x,y,z)=0. (FWIW, centered on the origin and symmetric about all three Cartesian axes.)
I have implemented a couple of different approaches for Gaussian and mean curvature using divergence, the Hessian, the first and second fundamental forms, and other approaches of which I have a similarly weak grasp. I am generally able to get things to work for degenrate cases (e.g., a sphere), but if I increase the complexity of my object, I am tending to get answers that imply I am flirting with the precipice of numerical instability (e.g., imaginary results where Re(x)/Im(x)~10^8).
I like the idea of this approach because it "feels clean": (1) use continuous function; (2) apply magic; (3) integrate in spherical coordinates; and (4) profit. However, I am beginning to think that I need to tune out the sires sweetly singing and go for a more practical (i.e., tractable) approach.
My other idea is to start by using the inside-outside function to generate [X,Y,Z] similar to what is used by surf(). I can then use surfature() from the FEX to get the curvatures at every point on my [X,Y,Z] mesh. Finally, I could convert everything to spherical coordinates and integrate the curvature arrays to get average values.
My concern here is that reregularly-spaced [X,Y,Z] does not translate to regularly-spaced [r,theta,phi], so the calculation is somehow pathologically biased. I am also unsure about how to do the actual integration after converting my array to spherical coordinates.
Apologies for such a long text-dense question. I thought about trying to illustrate this better with a couple of code snippets, but the algebra is really messy and not all that informative.
Thanks, in advance. Hi, All —
I would like to compute the average curvature of a closed 3D surface for which I know the inside-outside function, F(x,y,z)=0. (FWIW, centered on the origin and symmetric about all three Cartesian axes.)
I have implemented a couple of different approaches for Gaussian and mean curvature using divergence, the Hessian, the first and second fundamental forms, and other approaches of which I have a similarly weak grasp. I am generally able to get things to work for degenrate cases (e.g., a sphere), but if I increase the complexity of my object, I am tending to get answers that imply I am flirting with the precipice of numerical instability (e.g., imaginary results where Re(x)/Im(x)~10^8).
I like the idea of this approach because it "feels clean": (1) use continuous function; (2) apply magic; (3) integrate in spherical coordinates; and (4) profit. However, I am beginning to think that I need to tune out the sires sweetly singing and go for a more practical (i.e., tractable) approach.
My other idea is to start by using the inside-outside function to generate [X,Y,Z] similar to what is used by surf(). I can then use surfature() from the FEX to get the curvatures at every point on my [X,Y,Z] mesh. Finally, I could convert everything to spherical coordinates and integrate the curvature arrays to get average values.
My concern here is that reregularly-spaced [X,Y,Z] does not translate to regularly-spaced [r,theta,phi], so the calculation is somehow pathologically biased. I am also unsure about how to do the actual integration after converting my array to spherical coordinates.
Apologies for such a long text-dense question. I thought about trying to illustrate this better with a couple of code snippets, but the algebra is really messy and not all that informative.
Thanks, in advance. differential geometry, curvature, spherical averaging MATLAB Answers — New Questions

​

How can I do that with two matrices with any dimensions that can multiply ?
Thank youHow can I do that with two matrices with any dimensions that can multiply ?
Thank you How can I do that with two matrices with any dimensions that can multiply ?
Thank you matrix, array, multiple MATLAB Answers — New Questions

​

Hello everyone,
I have been trying to run my model which is a simscape electrical based EV model. It used to run, but now it is crashing after 15 sec, and sometimes it shows error such as "The exception unknown software exception (0x0000008) in the application at the location 0x00007FFD32C4837A". What could be the issue.

I had model this using 2024a, but I also tried to export it to 2023a because I thought there migh be some issue with 2024a. Still the issue prevails. What could be the issue fi anyone knows?Hello everyone,
I have been trying to run my model which is a simscape electrical based EV model. It used to run, but now it is crashing after 15 sec, and sometimes it shows error such as "The exception unknown software exception (0x0000008) in the application at the location 0x00007FFD32C4837A". What could be the issue.

I had model this using 2024a, but I also tried to export it to 2023a because I thought there migh be some issue with 2024a. Still the issue prevails. What could be the issue fi anyone knows? Hello everyone,
I have been trying to run my model which is a simscape electrical based EV model. It used to run, but now it is crashing after 15 sec, and sometimes it shows error such as "The exception unknown software exception (0x0000008) in the application at the location 0x00007FFD32C4837A". What could be the issue.

I had model this using 2024a, but I also tried to export it to 2023a because I thought there migh be some issue with 2024a. Still the issue prevails. What could be the issue fi anyone knows? simscape, power_electronics_control MATLAB Answers — New Questions

​

Hello,

I’m currently working on simulating a planar continuous parallel robot using Simscape, specifically the triskele bot. My goal is to modify the angles of either RevoluteJoint 0, 1 or 2 using an input. However, when I attempt this, I encounter the error mentioned below. Strangely, my model works without any errors when I provide torque input instead of motion. Could someone please help me identify where I’ve gone wrong? Thank you.

Project:
Is attached.
Error message:

Error:An error occurred while running the simulation and the simulation was terminated
Caused by:
[‘model_beam_1/Solver Configuration’]: Model not assembled. The following violation occurred: Position Violation. The failure occurred during the attempt to assemble all joints in the system and satisfy any motion inputs. If an Update Diagram operation completes successfully, the failure is likely caused by motion inputs. Consider adjusting the motion inputs to specify a different starting configuration. Also consider adjusting or adding joint targets to better guide the assembly.Hello,

I’m currently working on simulating a planar continuous parallel robot using Simscape, specifically the triskele bot. My goal is to modify the angles of either RevoluteJoint 0, 1 or 2 using an input. However, when I attempt this, I encounter the error mentioned below. Strangely, my model works without any errors when I provide torque input instead of motion. Could someone please help me identify where I’ve gone wrong? Thank you.

Project:
Is attached.
Error message:

Error:An error occurred while running the simulation and the simulation was terminated
Caused by:
[‘model_beam_1/Solver Configuration’]: Model not assembled. The following violation occurred: Position Violation. The failure occurred during the attempt to assemble all joints in the system and satisfy any motion inputs. If an Update Diagram operation completes successfully, the failure is likely caused by motion inputs. Consider adjusting the motion inputs to specify a different starting configuration. Also consider adjusting or adding joint targets to better guide the assembly. Hello,

I’m currently working on simulating a planar continuous parallel robot using Simscape, specifically the triskele bot. My goal is to modify the angles of either RevoluteJoint 0, 1 or 2 using an input. However, when I attempt this, I encounter the error mentioned below. Strangely, my model works without any errors when I provide torque input instead of motion. Could someone please help me identify where I’ve gone wrong? Thank you.

Project:
Is attached.
Error message:

Error:An error occurred while running the simulation and the simulation was terminated
Caused by:
[‘model_beam_1/Solver Configuration’]: Model not assembled. The following violation occurred: Position Violation. The failure occurred during the attempt to assemble all joints in the system and satisfy any motion inputs. If an Update Diagram operation completes successfully, the failure is likely caused by motion inputs. Consider adjusting the motion inputs to specify a different starting configuration. Also consider adjusting or adding joint targets to better guide the assembly. position violation, simscape, beam model, simulink MATLAB Answers — New Questions

​

Hello team,
I am facing one issue in the generated code of a Variant Subsystem used inside a library.
Since the library has been used for multiple instances, with different control inputs for the variant subsystem (implemented inside a library), the generated code is expected to have definitions for each of the control input based on the instance used for that particular variant subsystem.
I am able to achieve this for one default value though the other control input definitions are not shown in the generated code. I am sharing the respective code snapshot for your reference. Requesting your support to achieve expected and required definitions in the generated code.
Please guide me if there is any applicable setting or similar update is required to achieve the desired results.Hello team,
I am facing one issue in the generated code of a Variant Subsystem used inside a library.
Since the library has been used for multiple instances, with different control inputs for the variant subsystem (implemented inside a library), the generated code is expected to have definitions for each of the control input based on the instance used for that particular variant subsystem.
I am able to achieve this for one default value though the other control input definitions are not shown in the generated code. I am sharing the respective code snapshot for your reference. Requesting your support to achieve expected and required definitions in the generated code.
Please guide me if there is any applicable setting or similar update is required to achieve the desired results. Hello team,
I am facing one issue in the generated code of a Variant Subsystem used inside a library.
Since the library has been used for multiple instances, with different control inputs for the variant subsystem (implemented inside a library), the generated code is expected to have definitions for each of the control input based on the instance used for that particular variant subsystem.
I am able to achieve this for one default value though the other control input definitions are not shown in the generated code. I am sharing the respective code snapshot for your reference. Requesting your support to achieve expected and required definitions in the generated code.
Please guide me if there is any applicable setting or similar update is required to achieve the desired results. code generation, variant subsystem MATLAB Answers — New Questions

​

I’m trying to use the Java robot to do a page-right command which, in the program in I’m trying to use it for, can be performed with a SHIFT-RIGHT keyboard input. This is essentialy the code I’m using:
import java.awt.*
import java.awt.event.*
rob=Robot;

rob.keyPress(KeyEvent.VK_SHIFT)
rob.keyPress(KeyEvent.VK_RIGHT)
rob.keyRelease(KeyEvent.VK_RIGHT)
rob.keyRelease(KeyEvent.VK_SHIFT)
However, when running the code, the shift key is pressed but appears to essentially be released before the right arrow is pressed, so I only get a single movement to the right instead of a page-right. Replacing VK_RIGHT with VK_A will correctly type an uppercase A as expected, so there seems to be some issue with combining the SHIFT key with non-character keys. I tried adding an autoDelay and adding long pauses between key events, but it didn’t fix the issue.
I can of course program it to press the right arrow multiple times, but that’s messier and slower and involves an extra step where I have to determine how many right arrow presses it takes to do a page-right.
Any ideas what I can do?I’m trying to use the Java robot to do a page-right command which, in the program in I’m trying to use it for, can be performed with a SHIFT-RIGHT keyboard input. This is essentialy the code I’m using:
import java.awt.*
import java.awt.event.*
rob=Robot;

rob.keyPress(KeyEvent.VK_SHIFT)
rob.keyPress(KeyEvent.VK_RIGHT)
rob.keyRelease(KeyEvent.VK_RIGHT)
rob.keyRelease(KeyEvent.VK_SHIFT)
However, when running the code, the shift key is pressed but appears to essentially be released before the right arrow is pressed, so I only get a single movement to the right instead of a page-right. Replacing VK_RIGHT with VK_A will correctly type an uppercase A as expected, so there seems to be some issue with combining the SHIFT key with non-character keys. I tried adding an autoDelay and adding long pauses between key events, but it didn’t fix the issue.
I can of course program it to press the right arrow multiple times, but that’s messier and slower and involves an extra step where I have to determine how many right arrow presses it takes to do a page-right.
Any ideas what I can do? I’m trying to use the Java robot to do a page-right command which, in the program in I’m trying to use it for, can be performed with a SHIFT-RIGHT keyboard input. This is essentialy the code I’m using:
import java.awt.*
import java.awt.event.*
rob=Robot;

rob.keyPress(KeyEvent.VK_SHIFT)
rob.keyPress(KeyEvent.VK_RIGHT)
rob.keyRelease(KeyEvent.VK_RIGHT)
rob.keyRelease(KeyEvent.VK_SHIFT)
However, when running the code, the shift key is pressed but appears to essentially be released before the right arrow is pressed, so I only get a single movement to the right instead of a page-right. Replacing VK_RIGHT with VK_A will correctly type an uppercase A as expected, so there seems to be some issue with combining the SHIFT key with non-character keys. I tried adding an autoDelay and adding long pauses between key events, but it didn’t fix the issue.
I can of course program it to press the right arrow multiple times, but that’s messier and slower and involves an extra step where I have to determine how many right arrow presses it takes to do a page-right.
Any ideas what I can do? java, robot MATLAB Answers — New Questions

​

We were using lib.mdl file for cusomised library of our tool in simulink and it was working fine till 2023b version but in 2024a and 2024b version it is giving me error saying the lib file has to be in .slx extension what is the exact reason to this?
error image:

whether .mdl extension for libraries is deprecated or not, we are in a confusion please provide us a accurate reason for this issue.We were using lib.mdl file for cusomised library of our tool in simulink and it was working fine till 2023b version but in 2024a and 2024b version it is giving me error saying the lib file has to be in .slx extension what is the exact reason to this?
error image:

whether .mdl extension for libraries is deprecated or not, we are in a confusion please provide us a accurate reason for this issue. We were using lib.mdl file for cusomised library of our tool in simulink and it was working fine till 2023b version but in 2024a and 2024b version it is giving me error saying the lib file has to be in .slx extension what is the exact reason to this?
error image:

whether .mdl extension for libraries is deprecated or not, we are in a confusion please provide us a accurate reason for this issue. library file issue MATLAB Answers — New Questions

​

Hello everyone,

I am trying to generate a simple dll file from a simulink model. Basically the model takes an input, multiplies by two and puts it into an output. So I have created a matlab function in simulink such as this:
function y = fcn(u)
y = 2*u;

Now I want to generate the .dll file by using embedded coder. So I select ‘Shared library’, select the subsystem in simulink and click in embedded coder -> Generate subsystem. As a result I get a lot of files and mainly important the file multiply2.c Looking at the code I can see:
/* Model step function */
void multiply20_step(void)
{
/* Outport: ‘<Root>/y’ incorporates:
* Inport: ‘<Root>/u’
* MATLAB Function: ‘<Root>/multiply2’
*/
multiply20_Y.y = 2.0 * multiply20_U.signal1;
}

The .dll file is also generated properly. The thing is that I want to use this .dll in other program and to use it I need to use a function with inputs and ouputs to be able to call the dll. So I am trying to generate the C files and the .dll such that this function is something like this:
int multiply20_step(int)
{
The rest of the code.
}

I want this to be able to call this function with input parameters. I think that it migth have something to do with the Code generation/Interface parameters or maybe with the ‘Code Interface’ but I wasn’t able yet to solve it.

Could someone help me please. Thanks in advance.Hello everyone,

I am trying to generate a simple dll file from a simulink model. Basically the model takes an input, multiplies by two and puts it into an output. So I have created a matlab function in simulink such as this:
function y = fcn(u)
y = 2*u;

Now I want to generate the .dll file by using embedded coder. So I select ‘Shared library’, select the subsystem in simulink and click in embedded coder -> Generate subsystem. As a result I get a lot of files and mainly important the file multiply2.c Looking at the code I can see:
/* Model step function */
void multiply20_step(void)
{
/* Outport: ‘<Root>/y’ incorporates:
* Inport: ‘<Root>/u’
* MATLAB Function: ‘<Root>/multiply2’
*/
multiply20_Y.y = 2.0 * multiply20_U.signal1;
}

The .dll file is also generated properly. The thing is that I want to use this .dll in other program and to use it I need to use a function with inputs and ouputs to be able to call the dll. So I am trying to generate the C files and the .dll such that this function is something like this:
int multiply20_step(int)
{
The rest of the code.
}

I want this to be able to call this function with input parameters. I think that it migth have something to do with the Code generation/Interface parameters or maybe with the ‘Code Interface’ but I wasn’t able yet to solve it.

Could someone help me please. Thanks in advance. Hello everyone,

I am trying to generate a simple dll file from a simulink model. Basically the model takes an input, multiplies by two and puts it into an output. So I have created a matlab function in simulink such as this:
function y = fcn(u)
y = 2*u;

Now I want to generate the .dll file by using embedded coder. So I select ‘Shared library’, select the subsystem in simulink and click in embedded coder -> Generate subsystem. As a result I get a lot of files and mainly important the file multiply2.c Looking at the code I can see:
/* Model step function */
void multiply20_step(void)
{
/* Outport: ‘<Root>/y’ incorporates:
* Inport: ‘<Root>/u’
* MATLAB Function: ‘<Root>/multiply2’
*/
multiply20_Y.y = 2.0 * multiply20_U.signal1;
}

The .dll file is also generated properly. The thing is that I want to use this .dll in other program and to use it I need to use a function with inputs and ouputs to be able to call the dll. So I am trying to generate the C files and the .dll such that this function is something like this:
int multiply20_step(int)
{
The rest of the code.
}

I want this to be able to call this function with input parameters. I think that it migth have something to do with the Code generation/Interface parameters or maybe with the ‘Code Interface’ but I wasn’t able yet to solve it.

Could someone help me please. Thanks in advance. embedded coder, simulink, dll files MATLAB Answers — New Questions

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I want to find a way to write a compact script that requests user input on a listdlg box and plots a graph depending on the parameters chosen (could be multiple parameters). I am relatively new to matlab and I want to write a generalized condition instead of hard-coding all possible combinations and plotting the outcome. I want to be able to plot up to 6 parameters in one graph with a compact code instead of writing the conditions 6!=6x5x4x3x2x1=720 times :/. To get a feel of my code:

list={‘Live data’,’Historic data’};
[type,tf] = listdlg(‘ListString’,list);

if type==1

list_title={‘a’,’b’,’c’};
[Topic_ID,tf] = listdlg(‘ListString’,list_title);

if 1 >= Topic_ID <= 3

list_var={‘NO2′,’CO’,’SO2′,’H2S’,’humidity’,’temperature’};
[var_pos,tf] = listdlg(‘PromptString’,’Select a variable to plot:’,’ListString’, list_var);
var_size=size(var_pos);

if var_pos==1 %Plot only NO2
figure(1)
t=datenum(datetime,’yyyy-mm-ddTHH:MM:SS.FFF’);
plot(t,NO2)
datetick(‘x’,’dd-mmm-yyyy HH:MM:SS’,’keepticks’,’keeplimits’);
xlabel(‘Time (dd-mmm-yyyy HH:MM:SS)’);
ylabel(‘NO2 (ppb)’);
title(‘NO2’);
legend(‘NO2’);
end

if isequal(var_pos,[1,2]) %Plot CO and NO2
figure(7)
t=datenum(datetime,’yyyy-mm-ddTHH:MM:SS.FFF’);
plot(t,NO2,t,CO)
datetick(‘x’,’dd-mmm-yyyy HH:MM:SS’,’keepticks’,’keeplimits’);
xlabel(‘Time (dd-mmm-yyyy HH:MM:SS)’);
ylabel(‘CO & NO2 (ppb)’);
title(‘CO & NO2’);
legend(‘NO2′,’CO’);
end

Where var_pos is the matrix that contains which list items were chosen. Appreciate any help. I can’t figure it out.I want to find a way to write a compact script that requests user input on a listdlg box and plots a graph depending on the parameters chosen (could be multiple parameters). I am relatively new to matlab and I want to write a generalized condition instead of hard-coding all possible combinations and plotting the outcome. I want to be able to plot up to 6 parameters in one graph with a compact code instead of writing the conditions 6!=6x5x4x3x2x1=720 times :/. To get a feel of my code:

list={‘Live data’,’Historic data’};
[type,tf] = listdlg(‘ListString’,list);

if type==1

list_title={‘a’,’b’,’c’};
[Topic_ID,tf] = listdlg(‘ListString’,list_title);

if 1 >= Topic_ID <= 3

list_var={‘NO2′,’CO’,’SO2′,’H2S’,’humidity’,’temperature’};
[var_pos,tf] = listdlg(‘PromptString’,’Select a variable to plot:’,’ListString’, list_var);
var_size=size(var_pos);

if var_pos==1 %Plot only NO2
figure(1)
t=datenum(datetime,’yyyy-mm-ddTHH:MM:SS.FFF’);
plot(t,NO2)
datetick(‘x’,’dd-mmm-yyyy HH:MM:SS’,’keepticks’,’keeplimits’);
xlabel(‘Time (dd-mmm-yyyy HH:MM:SS)’);
ylabel(‘NO2 (ppb)’);
title(‘NO2’);
legend(‘NO2’);
end

if isequal(var_pos,[1,2]) %Plot CO and NO2
figure(7)
t=datenum(datetime,’yyyy-mm-ddTHH:MM:SS.FFF’);
plot(t,NO2,t,CO)
datetick(‘x’,’dd-mmm-yyyy HH:MM:SS’,’keepticks’,’keeplimits’);
xlabel(‘Time (dd-mmm-yyyy HH:MM:SS)’);
ylabel(‘CO & NO2 (ppb)’);
title(‘CO & NO2’);
legend(‘NO2′,’CO’);
end

Where var_pos is the matrix that contains which list items were chosen. Appreciate any help. I can’t figure it out. I want to find a way to write a compact script that requests user input on a listdlg box and plots a graph depending on the parameters chosen (could be multiple parameters). I am relatively new to matlab and I want to write a generalized condition instead of hard-coding all possible combinations and plotting the outcome. I want to be able to plot up to 6 parameters in one graph with a compact code instead of writing the conditions 6!=6x5x4x3x2x1=720 times :/. To get a feel of my code:

list={‘Live data’,’Historic data’};
[type,tf] = listdlg(‘ListString’,list);

if type==1

list_title={‘a’,’b’,’c’};
[Topic_ID,tf] = listdlg(‘ListString’,list_title);

if 1 >= Topic_ID <= 3

list_var={‘NO2′,’CO’,’SO2′,’H2S’,’humidity’,’temperature’};
[var_pos,tf] = listdlg(‘PromptString’,’Select a variable to plot:’,’ListString’, list_var);
var_size=size(var_pos);

if var_pos==1 %Plot only NO2
figure(1)
t=datenum(datetime,’yyyy-mm-ddTHH:MM:SS.FFF’);
plot(t,NO2)
datetick(‘x’,’dd-mmm-yyyy HH:MM:SS’,’keepticks’,’keeplimits’);
xlabel(‘Time (dd-mmm-yyyy HH:MM:SS)’);
ylabel(‘NO2 (ppb)’);
title(‘NO2’);
legend(‘NO2’);
end

if isequal(var_pos,[1,2]) %Plot CO and NO2
figure(7)
t=datenum(datetime,’yyyy-mm-ddTHH:MM:SS.FFF’);
plot(t,NO2,t,CO)
datetick(‘x’,’dd-mmm-yyyy HH:MM:SS’,’keepticks’,’keeplimits’);
xlabel(‘Time (dd-mmm-yyyy HH:MM:SS)’);
ylabel(‘CO & NO2 (ppb)’);
title(‘CO & NO2’);
legend(‘NO2′,’CO’);
end

Where var_pos is the matrix that contains which list items were chosen. Appreciate any help. I can’t figure it out. listdlg, multiple plots MATLAB Answers — New Questions

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