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

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Robert 2014-10-1

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评论： Ameya Tambe 2020-8-10

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 :)

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Image Analyst 2014-10-8

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.

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Answer 1

Mohammad Abouali 2014-10-8

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编辑：Mohammad Abouali 2014-10-8

在 MATLAB Online 中打开

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.

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Ameya Tambe 2020-8-10

can you explain me what the number 3 in argument stands for.

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Answer 2

Aslak Grinsted 2014-10-1

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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.

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Robert 2014-10-8

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...

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