how to write for loop with two variables

Hello, I'm having problem with this it of code:

for j = 1:3 
    for m = 3:-1:1
imagesc(images{m}, 'XData', [fid1(j,1) (size(Image1,2) + fid1(j,1))], 'YData',[fid2(j,1) (size(Image1, 1) + fid2(j,1))]), axis equal, axis xy
alpha(0.7)
hold on
    end
end

As you can see, I want the images{m} to start from 3 and end at 1, while the fid1(j,1) commands to go in the opposite direction. Any ideas how to solve this? One idea I had was to flip my images{m} array but I'm not sure how to do this

Thanks

Answer 1

[Image Analyst]

Try

images = fliplr(images);  % or flipud() - what ever works.

Or

images = images(end:-1:1);

[mika maka]

thanks that works, but what about the for loop, is it not possible for it have two variables? I don't quite understand why this does not work.

[Joseph Cheng]

*cough* well if you take a look at the answer below. you can see how to get 2 variables to work. why your nested (is that the right term?) for loop doesn't really do what you want is because it'll do all combination of m for each j. so for j=1 you'll run through it for m=3,2,1 and then for j=2 you'll run through it again for m=3,2,1 and so on.

[Joseph Cheng]

Oh and additionally thinking about it more you could have had

m=length(images);
  for j = 1:3 
          imagesc(images{m+1-j}, 'XData', [fid1(j,1) (size(Image1,2) + fid1(j,1))], 'YData',[fid2(j,1) (size(Image1, 1) + fid2(j,1))])
          axis equal
          axis xy 
          alpha(0.7) 
          hold on 
  end

Answer 2

[Joseph Cheng]

make an array called index = 3:-1:1;

for j = 1:3 
      m=index(j);
        imagesc(images{m}, 'XData', [fid1(j,1) (size(Image1,2) + fid1(j,1))], 'YData',[fid2(j,1) (size(Image1, 1) + fid2(j,1))])
        axis equal
        axis xy 
        alpha(0.7) 
        hold on 
end