MATLAB: Assignin variables in a stand-alone application

assigninstandalone application

I have a GUI with a button that uses the assignin() function to send variables to the 'base' for debug and analysis purposes when running the code in Matlab. What happens to these variables when the application is run as a stand-alone version? Should I disable the button when compiled as a stand-alone? Is there a test I can perform to determine if the button should be disabled or enabled?

Best Answer

The variables still get assigned to the base workspace. The base workspace would get destroyed (along with all other workspaces) when the standalone application exited, but the variables can be used until that point.

If it does not make sense in your context to be able to save those variables in stand-alone mode, use isdeployed()

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MATLAB: How to make an app built by AppDesigner suitable for deployment as santdalone

I understand that you would like to provide matrices available in a workspace as user inputs to your standalone application. In general, compiled applications do not process dynamic content at the run time, for example, MATLAB files. Since you want a workspace variable to be available as an input to the application, one way of doing this is to save those variables in a '.mat' file as follows:

>> save filename.mat

After saving the workspace variables you could either include this "filename.mat" while creating the standalone application or take this file as an input through GUI of application which I guess you are trying to achieve. You can browse through this file using 'uigetfile' function, store path and file name and provide this full path of file to 'importdata' function to read '.mat' file as follows:

function TestInput()
  [filename,pathname]=uigetfile({'*.mat'});
  filename=[pathname filename];
  data=importdata(filename);
end

This way you will not have to use 'evalin' function which requires current workspace.

I would suggest looking at the below documentation link which talks about refraining from using dynamic code at run time of application and alternative of 'eval'.

http://www.mathworks.com/help/compiler/excel/writing-deployable-matlab-code.html

I hope this will help you in resolving the issue.

MATLAB: Do I receive a “lcclnk.exe-Application” error when I try to compile the GUIDE-based application into a C stand-alone using the LCC compiler with MATLAB

This has been verified as a bug in MATLAB Compiler 3.0 (R13) in the way that LCC compiler handles compiling C stand-alone applications. This problem is specific to the LCC compiler. There are currently no known workarounds if you want to use the LCC compiler.

Use Microsoft Visual C++ 6.0 compiler or any other supported compiler as mentioned in the technical note at the following URL:

http://www.mathworks.com/support/compilers/current_release/

Best Answer

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MATLAB: How to make an app built by AppDesigner suitable for deployment as santdalone

MATLAB: Do I receive a “lcclnk.exe-Application” error when I try to compile the GUIDE-based application into a C stand-alone using the LCC compiler with MATLAB

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