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

​

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

​

The scikit-learn package in Python has a <http://scikit-learn.org/stable/modules/generated/sklearn.model_selection.GroupKFold.html Group K-Fold> function that allows you to split the data-set into test/train folds while ensuring the same "group" is not present in different folds.
This is useful for example in studies where the same subject/person generates multiple data-points and we want to make sure the samples/data-points belonging to the same subject don’t appear in both the training and testing folds.

I was wondering if MATLAB has a way to do this or enable this option in <https://www.mathworks.com/help/stats/cvpartition.html cvpartition> function or in some other way. The default options only seem to preserve relative class-sizes.The scikit-learn package in Python has a <http://scikit-learn.org/stable/modules/generated/sklearn.model_selection.GroupKFold.html Group K-Fold> function that allows you to split the data-set into test/train folds while ensuring the same "group" is not present in different folds.
This is useful for example in studies where the same subject/person generates multiple data-points and we want to make sure the samples/data-points belonging to the same subject don’t appear in both the training and testing folds.

I was wondering if MATLAB has a way to do this or enable this option in <https://www.mathworks.com/help/stats/cvpartition.html cvpartition> function or in some other way. The default options only seem to preserve relative class-sizes. The scikit-learn package in Python has a <http://scikit-learn.org/stable/modules/generated/sklearn.model_selection.GroupKFold.html Group K-Fold> function that allows you to split the data-set into test/train folds while ensuring the same "group" is not present in different folds.
This is useful for example in studies where the same subject/person generates multiple data-points and we want to make sure the samples/data-points belonging to the same subject don’t appear in both the training and testing folds.

I was wondering if MATLAB has a way to do this or enable this option in <https://www.mathworks.com/help/stats/cvpartition.html cvpartition> function or in some other way. The default options only seem to preserve relative class-sizes. classification, machine learning, cvpartition MATLAB Answers — New Questions

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I want to work on 1.5 L naturally aspirated mapped engine whereas the default engine variant is 1.5L turbocharged engine how do i change my engine variantI want to work on 1.5 L naturally aspirated mapped engine whereas the default engine variant is 1.5L turbocharged engine how do i change my engine variant I want to work on 1.5 L naturally aspirated mapped engine whereas the default engine variant is 1.5L turbocharged engine how do i change my engine variant powertrain blockset, engine variant selection MATLAB Answers — New Questions

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I have a matlab toolbox, with a single-window GUI. I was able to build it mcc/deploytool to create a standalone 7MB executable. However, I was not happy for the installer size, as the R2016 matlab runtime is 700MB in size, 100x larger than my application.
When I saw a new matlab compiler API compiler.runtime.custominstaller coming with R2024b is cable of creating smaller MCR installer including only needed files, I was very happy and immediately tried it on free mod apk games website, however, the result was disappointing.
The installer bundled with MCR in R2024b for my app build by deploytool – without using the customInstaller – is 1.2GB in size (another 2x increase in size compared to the already large package generated by R2016). Then, when I called
results = compiler.build.standaloneApplication("myapp.m");
compiler.runtime.customInstaller("myapp_installer", results, ‘RuntimeDelivery’, ‘installer’);

however, the generated package has the same 1.2GB in size. I have followed the help page of compiler.runtime.customInstaller
https://www.mathworks.com/help/compiler/compiler.runtime.custominstaller.html
did I miss anything? why customInstaller fails to trim the installer size? my app only use basic matlab features.
the requiredMCRProducts.txt file shows that I only need the following MCR components
‘MATLAB Runtime – Core’
‘MATLAB Runtime – Graphics’
‘MATLAB Runtime – Non Interactive MATLAB’
‘MATLAB Runtime – Numerics’
‘MATLAB Runtime – Image Processing Toolbox Addin’I have a matlab toolbox, with a single-window GUI. I was able to build it mcc/deploytool to create a standalone 7MB executable. However, I was not happy for the installer size, as the R2016 matlab runtime is 700MB in size, 100x larger than my application.
When I saw a new matlab compiler API compiler.runtime.custominstaller coming with R2024b is cable of creating smaller MCR installer including only needed files, I was very happy and immediately tried it on free mod apk games website, however, the result was disappointing.
The installer bundled with MCR in R2024b for my app build by deploytool – without using the customInstaller – is 1.2GB in size (another 2x increase in size compared to the already large package generated by R2016). Then, when I called
results = compiler.build.standaloneApplication("myapp.m");
compiler.runtime.customInstaller("myapp_installer", results, ‘RuntimeDelivery’, ‘installer’);

however, the generated package has the same 1.2GB in size. I have followed the help page of compiler.runtime.customInstaller
https://www.mathworks.com/help/compiler/compiler.runtime.custominstaller.html
did I miss anything? why customInstaller fails to trim the installer size? my app only use basic matlab features.
the requiredMCRProducts.txt file shows that I only need the following MCR components
‘MATLAB Runtime – Core’
‘MATLAB Runtime – Graphics’
‘MATLAB Runtime – Non Interactive MATLAB’
‘MATLAB Runtime – Numerics’
‘MATLAB Runtime – Image Processing Toolbox Addin’ I have a matlab toolbox, with a single-window GUI. I was able to build it mcc/deploytool to create a standalone 7MB executable. However, I was not happy for the installer size, as the R2016 matlab runtime is 700MB in size, 100x larger than my application.
When I saw a new matlab compiler API compiler.runtime.custominstaller coming with R2024b is cable of creating smaller MCR installer including only needed files, I was very happy and immediately tried it on free mod apk games website, however, the result was disappointing.
The installer bundled with MCR in R2024b for my app build by deploytool – without using the customInstaller – is 1.2GB in size (another 2x increase in size compared to the already large package generated by R2016). Then, when I called
results = compiler.build.standaloneApplication("myapp.m");
compiler.runtime.customInstaller("myapp_installer", results, ‘RuntimeDelivery’, ‘installer’);

however, the generated package has the same 1.2GB in size. I have followed the help page of compiler.runtime.customInstaller
https://www.mathworks.com/help/compiler/compiler.runtime.custominstaller.html
did I miss anything? why customInstaller fails to trim the installer size? my app only use basic matlab features.
the requiredMCRProducts.txt file shows that I only need the following MCR components
‘MATLAB Runtime – Core’
‘MATLAB Runtime – Graphics’
‘MATLAB Runtime – Non Interactive MATLAB’
‘MATLAB Runtime – Numerics’
‘MATLAB Runtime – Image Processing Toolbox Addin’ matlab MATLAB Answers — New Questions

​

Happy new year to all.
I am currently trying to create a simple electric drive train model, where it uses a battery connected to a converter to a motor and then calculate the thrust generated from the torque/rpm provided by the motor. I was also planning to include a simple feedback loop to ensure the input RPM was fulfiled.
In short, what i want to learn is, by having varying RPM input, how the motor would adjust itself to achieve the required RPM and how would this affect the battery SOC and the thrust calculation.
However, the output of my results is forever 0. Does anyone know where I gone wrong and if anyone could help me remedy my model. This would mean a lot, thank you in advance!
p.s. i am not an expert in electrical component, so do advise on what could be done.Happy new year to all.
I am currently trying to create a simple electric drive train model, where it uses a battery connected to a converter to a motor and then calculate the thrust generated from the torque/rpm provided by the motor. I was also planning to include a simple feedback loop to ensure the input RPM was fulfiled.
In short, what i want to learn is, by having varying RPM input, how the motor would adjust itself to achieve the required RPM and how would this affect the battery SOC and the thrust calculation.
However, the output of my results is forever 0. Does anyone know where I gone wrong and if anyone could help me remedy my model. This would mean a lot, thank you in advance!
p.s. i am not an expert in electrical component, so do advise on what could be done. Happy new year to all.
I am currently trying to create a simple electric drive train model, where it uses a battery connected to a converter to a motor and then calculate the thrust generated from the torque/rpm provided by the motor. I was also planning to include a simple feedback loop to ensure the input RPM was fulfiled.
In short, what i want to learn is, by having varying RPM input, how the motor would adjust itself to achieve the required RPM and how would this affect the battery SOC and the thrust calculation.
However, the output of my results is forever 0. Does anyone know where I gone wrong and if anyone could help me remedy my model. This would mean a lot, thank you in advance!
p.s. i am not an expert in electrical component, so do advise on what could be done. simulink, simscape, electric_motor_control MATLAB Answers — New Questions

​

Hi,

I have a text file having data with each row having the format: a1,a2,a3,a4. I have close 2k such rows. I need to save the full text file as a .mat file. How do I get that? I already tried tetxscan but I run into cell within cell issue. Appreciate help.Hi,

I have a text file having data with each row having the format: a1,a2,a3,a4. I have close 2k such rows. I need to save the full text file as a .mat file. How do I get that? I already tried tetxscan but I run into cell within cell issue. Appreciate help. Hi,

I have a text file having data with each row having the format: a1,a2,a3,a4. I have close 2k such rows. I need to save the full text file as a .mat file. How do I get that? I already tried tetxscan but I run into cell within cell issue. Appreciate help. text file, textscan, mat-file MATLAB Answers — New Questions

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