I'm having problems copying a 4-D array

The code is as follows:

for t = 1;1;frames;
    gifout(:,:,:,t) = uint8(gifin(:,:,1,t));
end

I am trying to copy a gif (stored as a 4-d array) with only a single colour dimension, where t is the amount of frames in the gif. The problem is that it is returning a single image rather than a series of images. What would be the correct way of implementing this?

As a side note, using

gifout(:,:,:,t) = uint8(gifin(:,:,:,t));

returns the error "Assignment has more non-singleton rhs dimensions than non-singleton subscripts", but I expected it to directly copy all frames. Can this be explained to me?

Thanks

[Walter Roberson]

for t = 1;1;frames;
         ^ ^

Did you use the : operator in your actual code?

Is there a reason you did not use

gifout = im2uint8(gifin);

with no loop?

[Connor Hogarth]

Because, I'm dumb. Thanks for the help, maybe I should get some sleep

Answer 1

[Matt J]

for t = 1:frames

Answer 2

[Walter Roberson]

https://www.mathworks.com/help/releases/R2017a/matlab/ref/imread.html?searchHighlight=imread&s_tid=doc_srchtitle#inputarg_idx

To read all of the frames for gif in your release, use 'Frames', 'all' in your imread() call.

Whether imread() reads all frames of gif by default, or only one frame, is something that changed between your release and current releases.