MATLAB: Superimpose matrices (n,n,m) to (n,n,1)

Question

I have a matrix a=360x360x100 (double)

I want to know how to superimpose all images and get a single matrix i.e 360x360x1 from 360x360x100

and plot that

for i = 1:100
l = data(:,i);
a100(:,:,i) = reshape(l, 360, []);
end
x = 1:size(a100,1);
y = 1:size(a100,2);
z = 1:size(a100,3); 

Now I can plot all but I want to superimpose all plots just hold on and plotting not works

Answer 1

Here are some options.

Compute and plot the maximum value at each pixel:

imagesc(max(a100,[],3))

Compute and plot the minimum value at each pixel:

imagesc(min(a100,[],3))

Compute and plot the sum of all the images:

imagesc(sum(a100,3))

Compute and plot the average of all the images:

imagesc(mean(a100,3))