Multiple loop variables Matlab

Question

In C++/C, we have multiple loop variables in a single loop, like for(int i=0; int j=0; i<5; j<5; i++; j++) Is there any facility in Matlab

Answer 1

As chappjc pointed out, and as MathWorks states in the documentation, each iteration of a for loop takes the next column of the iterator. Thus, to iterate through a column vector, for example, one must transpose it (i.e. for ii = [1; 1; 2; 3; 5]'), otherwise ii is equal to the column vector, all at once.

And merely to extend chappjc's excellent answer, you may take advantage of this behavior with cells, also, where you might have some differently sized strings, in addition to wanting a numeric iterator, and then you can deal them to variables so you don't have to do as much indexing. Here is a crude example:

figure(1)
imageList = {};
for ii = [{somePath; someDirListing; 1}, {anotherPath; anotherDirListing; 2}] % Each iteration takes one column

    [pathname, images, iPos] = deal(ii{:});

    for iImage = images
        img = imread(fullfile(pathname, iImage));
        imagesc(img)
        axis image
        if iPos == 1
            title(['This is a left image, titled ' iImage])
        else
            title(['This is a right image, titled ' iImage])
        end
        pause(1)
    end
end