how to resolve the error index exceeds matrix dimensions

k1=1;
for i=19:29
    imag4=imscram(:,:,i);
    subplot(:,:,i);
    imshow(imag4);
[lllo,lhlo,hllo,hhlo]=dwt2(double(imag4),'haar');
llw(:,:,k1)=lllo(:,:);
lhw(:,:,k1)=lhlo(:,:);
hlw(:,:,k1)=hllo(:,:);
hhw(:,:,k1)=hhlo(:,:);
k1=k1+1;
figure
end

[KSSV]

The matrices given are not known to us. How you expect to find the error?

Answer 1

[Walter Roberson]

If subplot() is an array, then

      subplot(:,:,i);

is at best a waste of time, as that would extract a portion of the array and then throw the extracted value away because of the semi-colon. If the array had a third dimension smaller than 29, you would get an error about the index exceeding the dimension.

If subplot() is the MATLAB plotting function, then passing a colon to it is not valid.

[SIBI SIVA]

thank you for your suggestion. now my code is working.