Substitue for the Tilde in MATLAB

Question

I'm trying to execute a script in MATLAB that uses a tilde. However, earlier versions of MATLAB doesn't support the tilde. How can I substitute for the tilde?

Here is the code:

                fname = 'worldmap.png';
                img = imread(fname);
                [imgH,imgW,~] = size(img);

Answer 1

Just use a dummy variable in place of the tilde when it is not supported in your version

 [imgH, imgW, dummy_variable] = size(img);

Answer 2

The de-facto dump variable in older versions of matlab is 'ans', as it gets overwritten all the time anyway.