# How can I find the Difference between the Min and Max of all matching cells over different matrices?

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Robert on 1 Oct 2014
Commented: Ameya Tambe on 10 Aug 2020
Basically I have 12 matrices each for a month of the year (33x45). For each cell I want to know the difference between the max and min values recorded for the entire year.
I then want an output that is another matrix with the resulting differences in the appropriate cells.
Thanks in advance for any assistance :)
Image Analyst on 8 Oct 2014
Cells? Is the array a cell array or just a regular double numerical array? It's an important distinction regarding how you need to reference the cells or elements.

Mohammad Abouali on 8 Oct 2014
Edited: Mohammad Abouali on 8 Oct 2014
so do this
Data(:,:,1)=Month1_Data;
Data(:,:,2)=Month2_Data;
.
.
.
Data(:,:,12)=Month12_Data;
then
Amplitude=max(Data,[],3)-min(Data,[],3);
Amplitude would be what you are asking.
Ameya Tambe on 10 Aug 2020
can you explain me what the number 3 in argument stands for.

Aslak Grinsted on 1 Oct 2014
I would put the 12 matrices in a 33x45x12 matrix.
Then you can simply call
max(x,3)-min(x,3)
the '3' refers to take the maximum along the 3rd dimension of x.
Robert on 8 Oct 2014
Hi, Thanks for your answer. It sort of worked and sort of didn't. This solution gave me another 33x45x12 matrix, where I only want a 33x45 matrix output E.g. so 1:1 shows the max-min of all 12 1:1 cells in the martix...