Re: is_real_matrix()

[David Bateman]

Søren Hauberg a écrit :

> Hi,
> In C++ (using 2.9.3), I've been using the 'is_real_matrix' function, but
> don't get the results I expect. This code:
>
> if (args.length() != 1 || !args(0).is_real_matrix()) {
>    error("Input argument must be real matrix\n");
>    return ret;
> }
> Matrix Dkm1 = args(0).matrix_value();
>
> doesn't return an error if args(0) is a string. It does however give me
> this error:
>
>  
The string class has the matrix_value() function and so can be converted 
to a real matrix, it is therefore normal that it returns true for the 
test for real matrices... You should test if its a string first, or use 
something like

if (args.length() != 1 || args(0).type_name() != "matrix")

which will positively identify the type by it name as it appears in the 
"typeinfo" or "whos" command from the prompt..

Cheers
David

> error: invalid conversion from string to real matrix
>
> So how do I check if an input argument is a real matrix?
>
> /Søren
>
>
>
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