find min or max value element from more than two matrices

I know how we can find min or max value element from two matrices. For more than two matrices we can do two by two and then compare but I was wondering if there is any other simple way to find min or max value element from more than two matrices?

Answer 1

[George Papazafeiropoulos]

% data
matrix1=rand(2);
matrix2=rand(3);
matrix3=rand(4);
% engine
c=nan(4,4,3);
c(1:2,1:2,1)=matrix1;
c(1:3,1:3,2)=matrix2;
c(1:4,1:4,3)=matrix3;
% result
d=min(c,[],3)
e=max(c,[],3)

[Sanaz]

Great. I wanted that. Thanks.

[Image Analyst]

Are you sure? It's not what you asked for. You didn't say that you wanted an array of maxes and an array of mins after the individual arrays were all lined up in the upper left corner. And the values will depend on where you align the smaller matrices over the larger matrices.

[Sanaz]

I changed it a little bit and I used that like: a=rand(3,3); b=rand(3,3); c=rand(3,3); d(:,:,1)=a;d(:,:,2)=b;d(:,:,3)=c; and the minimum=min(d,[],3) (the result has the same size of a or b or c).

Answer 2

[Image Analyst]

For 3 matrices, you can do

minValue = min([a(:);b(:);c(:)])
maxValue = max([a(:);b(:);c(:)])

It's easy to see how to adapt it for more matrices.

[dpb]

Good 'un to use (:) to avoid the dimensions problem...don't know why didn't think of it. I removed the sorrier response.

[Star Strider]

Much more efficient.

+1