## How to get a matrix of all maximum values of elements of multiple matrices of the same size?

### Mike Mierlo van (view profile)

on 29 Sep 2019
Latest activity Commented on by Jackson Burns

on 29 Sep 2019

### Jackson Burns (view profile)

I want to get a matrix filled with elements that are the highest number of the element in other matrices on the same location in that matrix. The solution should work for large matrices, so manual labour is no option.
Simple example: I have matrix A, B and C of the same size. I want to form matrix D with in position 1,1 the max of A(1,1), B(1,1) and C(1,1). The same for position 1,2 etcetera. Matrix D is formed this way manually in the example below. I would like to have a code for this action, suitable for (very) large matrices.
if true
A= [1 2 3; 4 5 6];
B= [6 5 4; 3 2 1];
C= [4 4 4.5; 4.5 4 4];
end
if true
D = [6 5 4.5; 4.5 5 6]
end

### Jackson Burns (view profile)

on 29 Sep 2019

Hi Mike!
Here's a function I wrote to do the task. It assumes that the three input arrays are the same dimensions.
function outarray = findmaxes(inarray1,inarray2,inarray3)
outarray = zeros(size(inarray1));
for i = 1:numel(inarray1)
outarray(i) = max([inarray1(i) inarray2(i) inarray3(i)]);
end
end
Call it like this:
maxarray = findmaxes(A,B,C)

Mike Mierlo van

on 29 Sep 2019
Thanks!
Jackson Burns

on 29 Sep 2019
No problem!