Code running multiple times for different elements of a matrix

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Andreas S 2020-10-9

评论： Matt J 2020-10-10

Hi everyone. I need some help to code this problem:

The data is 480x10 matrix(ret). I want to calculate the mean of each column from the past 120 elements of the same column

m1=mean(ret(1:120,1:10))

m2=mean(ret(2:121,1:10))

...

m360=mean(ret(360:480,1:10))

How can i do it with a loop and receive the results in a matrix 360x10.

Matt J 2020-10-9

I think you mean,

m360=mean(ret(360:479,1:10))

m361=mean(ret(361:480,1:10))

Matt J 2020-10-9

编辑：Matt J 2020-10-9

m=conv2(ret,ones(120,1)/120,'valid')

Andreas S 2020-10-10

Thank you very much! It worked for me.

Matt J 2020-10-10

You're welcome, but please Accept-click the answer to certify that it worked.

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