MATLAB: Matlab Standalone exe conditional statement not working

standalone executable

Hello,

i´m working on an image registration program which will be exported by the mcc comand. The program uses an extern library which should not be included in the exe. After creating a Proto-File from the .dll and .h file and exporting the .m file as an exe the function is not working anymore. After some tests i think i might found the problem. Inside the function is a conditional if/ifelse statement to choose an image registration method. It seems like the standalone exe just skips this part and therefore multiple variables are not declared. The program then stops with the error "variable not found". I tried to replace the if-else statement with a switch case but this does not work as well. So my question is why does the standalone skip the conditional statement? Or may it be another problem?

Thank for the help!

Best Answer

From the original message:

"The flag is set as an input parameter of the function (beside two others). The first two input arguments are strings (I validated the correct input the function uses them correctly). The flag itself is just a integer."

From the documentation in the "Using a MATLAB File You Plan to Deploy" section:

"When running MATLAB files that use arguments that you also plan to deploy with MATLAB Compiler, keep the following in mind:

The input arguments you pass to your executable from a system prompt will be received as character vector input. Thus, if you expect the data in a different format (for example, double), you must first convert the character vector input to the required format in your MATLAB code. For example, you can use str2num to convert the character vector input to numerical data."

The char vector '1' is not equal to the double value 1.

>> '1' == 1
ans =
  logical
   0

Related Solutions

MATLAB: Changine if-elseif to a switch-case structure

Dear Mike, You can convert if-else code to switch case structure as follows:

InputValue = input('Input value: ');
val = sum(InputValue < [70 60]);
switch val
    case 2
        disp('f')
    case 1
        disp('d')
    otherwise
        disp('Good job')
end

I hope it helps. Good luck!

MATLAB: File names with spaces used as command line arguments

Try this, where I was trying to accept a foldername, that contained images, via the command line of a compiled executable:

if isdeployed && ~isempty(varargin)
  % For some reason, it won't take the command line as a single item, even if it's in double quotes.
  % It splits it up and gets rid of leading and trailing spaces so that
  % "D:\word1 word2\theUser\Images"
  % becomes 2 cells:
  % varargin{1} = "D:\word1 
  % varargin{2} = word2\theUser\Images"
  % We need to join all these together.
  numberOfCells = length(varargin);
  if numberOfCells >= 1
    commandLineArgument = varargin{1};
    for k = 2 : numberOfCells
      thisWord = varargin{k};
%         fprintf(1, 'varargin{%d} = %s\n', k, thisWord);
      commandLineArgument = sprintf('%s %s', commandLineArgument, thisWord);
    end
    % Get rid of any quotes.
    commandLineArgument = strrep(commandLineArgument, '"', []);
    fprintf(1, 'The argument passed in on the command line is %s\n', commandLineArgument);
%       msgboxw(['The argument passed in on the command line is ', commandLineArgument]);
    if exist(commandLineArgument, 'dir')
      % If this folder exists, use it.
      handles.imageFolder = commandLineArgument;
      fprintf(1, 'Changed image folder to this: %s\n', handles.imageFolder);
    else
      fprintf(1, 'This folder does not exist, so we cannot change to it:\n     %s\n', commandLineArgument);
    end
  end
  fprintf(1, 'handles.imageFolder = %s\n', handles.imageFolder);
end

Best Answer

Related Solutions

MATLAB: Changine if-elseif to a switch-case structure

MATLAB: File names with spaces used as command line arguments

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