Using characters for indexing in 2019b

I am new to programming and was wondering how one would use text to input indexes for a matrix.

For example: I have this:

charr1 = ':,:,1,1,1,1,1,1';

XX = GridDo(XXInd);

and I want my output to use the indexing of charr1 to look like this:

XX = GridDo(:,:,1,1,1,1,1,1);

So that I can further automate my code.

Answer 1

[madhan ravi]

charr1 = ':,:,1,1,1,1,1,1';
ix1 = regexp(charr1, '\,','split');
ix2 = str2double(ix1);
ix1(~isnan(ix2)) = num2cell(ix2(~isnan(ix2)));

XX = GridDo(ix1{:})

[Ronald Strong]

Awesome, this worked!

Thanks Madhan!