Is there a Matlab function to convert any data structure to a string?

Question

I\'m looking for a function in Matlab to use for error messages, like so:

error([\'Invalid value for someVariable: \' wantedFunction(someVariable)]);
         


        

Answer 1

No, there is no such function. I ran into similar problems, so here is a very rudimentary function that I use. Do realize that it is not complete. For example, it does not output fields of a structure in a meaningful way, but that can easily be added. You can treat it as a base implementation and fit it to your needs.

function ret = all2str(param)
if isempty(param)
    if iscell(param)
        ret = '(empty cell)';
    elseif isstruct(param);
        ret = '(empty struct)';
    else
        ret = '(empty)';
    end
    return;
end

if ischar(param)
    ret = param;
    return;
end

if isnumeric(param)
    ret = num2str(param);
    return;
end

if iscell(param)
    ret = all2str(param{1});
    for i=2:numel(param)
        ret = [ret ', ' all2str(param{i})];
    end
    return;
end

if isstruct(param)
    ret = '(structure)';
    return;
end
end