Why does my for-loop nested in an if-statement not work?

I have an for-loop inside an if-statement nested again in another for-loop (I know sounds complicated, example below), which seems to run perfeclty, as long as until the loop is called the SECOND time. Then it gives me the error:

Index exceeds matrix dimensions.

Error in code (line 50)

imb=squeeze(B_proc(n,:,:));

Does anybody have an idea why?

Here the simplified for-if-for-loop:

 k=1;

 for i=2:length(proc_core)

    proc=cell2mat(proc_core(i,2));

    sz=size(proc);

    l=sz(1);

    vs=cell2mat(proc_core(i,3));

    if sz(2)==512 && sz(3)==512 && vs==2.5

        kl=k+l-1;

        Core(k:kl,:,:)=proc;

        k=k+l;

    elseif vs==2.5

        for n=1:length(proc)

        imb=squeeze(proc(n,:,:));

        imb=imresize(imb,[512 512]);

        Core(k,:,:)=imb;

        k=k+1;

        end

    end

 end

Answer 1

[Walter Roberson]

length(proc) is defined as:

if isempty(proc)
  length = 0
else
  length = max(size(proc))
end

You, however, used length(proc) as if it were defined as size(proc,1) . If one of the other dimensions of proc is bigger than the number of rows then that bigger dimension is the length.

[F S]

thanks a lot! I suspected there was some other bug in there but I just couldn't find it.