MATLAB: Exist() for functions only

2builtinexistexist functionfunction

As I understand, the exist() function in MATLAB will return "2" if the input is a MATLAB function.

The list of options for the second input 'kind' are builtin, class, dir, file, and var.

I want to input 'kind' so that exist() will ONLY search for functions, and return 2 if it is a match to a function and a 0 if not.

Is there any way to do this?

Best Answer

An option that is not exactly what you describe, but might work for you:

isempty(which([functionname,'.m']))

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MATLAB: Need help with understanding this

Hint:

if ~exist(filename............  % Use the 'file' option
    % Alert user that the file is not found.
    message = sprintf(............ 
    uiwait(errordlg(...............
    return;
end

That should be plenty for you to complete the assignment.

MATLAB: Does the EXIST function return an incorrect value in stand-alone mode

The EXIST function has limitations for support in stand-alone mode. For more information, see the solution attached at the bottom of this page.

As a workaround, you can use either NARGIN or the following code, if you wish to check for the existence of a variable:

function texist2
nw = 2;
try
      isempty(nw);
      myexist=1;
catch
      myexist=0;
end
fprintf(1,'exist: %d\n',myexist);

Best Answer

Related Solutions

MATLAB: Need help with understanding this

MATLAB: Does the EXIST function return an incorrect value in stand-alone mode

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