MATLAB: C code conversion question

code generation

i want to convert my .m file but error appears Failed to evaluate '(data)' to non-empty array in the base workspace,what should i do?

codegen -args (data) DSSS_base.m

Best Answer

Is the variable data defined in the base MATLAB workspace? Try:

whos

to see the currently defined variables. If not, please define it.

You may also want to use:

-args {data}

since multiple arguments are specified in a cell array like:

-args {arg1, arg2, arg3}

Related Solutions

MATLAB: Check if variable exists in workspace to plot variable, else generate error

replace

    if exist('AmechM','var')

    if exist('AmechM','var') == 1

or rather by

    ise = evalin( 'base', 'exist(''AmechM'',''var'') == 1' )
    if ise

since you want to know whether AmechM exists in the base workspace

and read the on-line help on exist and on "scope"

MATLAB: Using cellfun with function that can return nothing

I'm not going to comment on the wisdom of using evalin.

The problem is not with cellfun. You'll get the same error if you do:

val = evalin('base', '');

The error message could be better as it looks like you're seeing an implementation detail of evalin, but clearly, '' is not allowed as an input for evalin.

The workaround would be to create your own wrapper that catches errors with evalin (would also help if the variable name you pass is not actually a variable):

function value = evalin_with_catch(varname)  %no point in asking for the workspace. It can only be base here
    try
        value = evalin('base', varname)
    catch 
        value = 'INVALID VARIABLE';  %whatever value you want returned.
    end
end

then:

X_values = cellfun(@evalin_with_catch, C, 'UniformOutput', false);

Best Answer

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MATLAB: Check if variable exists in workspace to plot variable, else generate error

MATLAB: Using cellfun with function that can return nothing

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