Throw an error message with the dimensions of a matrix

Hello,

I want to throw an error message with the size of my matrices:

The minimal working example would be this one:

M = magic(3);
N = magic(4);
error(['size(M) = ' size(M) newline 'size(N) = ' size(N)])

The problem is that the output of size() is not a string so my error message looks like:

size(M) = 
size(N) = 

Is it possible to somehow print the dimensions of my matrix in an error message? My first intuition would be to save the return of size(M). but I couldn't find any solution for this.

Kind Regards,

Christian

Answer 1

[Star Strider]

use the num2str function:

M = magic(3);
N = magic(4);
error(['size(M) = ' num2str(size(M)) newline 'size(N) = ' num2str(size(N))])

produces:

Error using ... (line ###)
size(M) = 3  3
size(N) = 4  4

.