Hello! I'm looking for a function to get the mean of two (or more) columns: A = 1 2 3 4 5 6 7 8 9 f(A) = 1.5000 2.5000 4.5000 5.5000 7.5000 8.5000 How can I do that in a simple way, for a generic matrix? Thank you.

Mean of matrix by columns

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Alessandro Masullo 2013-10-13

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评论： Alessandro Masullo 2013-10-13

采纳的回答： Andrei Bobrov

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Hello! I'm looking for a function to get the mean of two (or more) columns:

 A = 1     2     3
   5     6
   8     9
 f(A) = 
5000    2.5000
5000    5.5000
5000    8.5000

How can I do that in a simple way, for a generic matrix? Thank you.

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Andrei Bobrov 2013-10-13

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conv2(A,[.5 .5],'valid')

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Alessandro Masullo 2013-10-13

Thank you!!

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sixwwwwww 2013-10-13

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编辑：sixwwwwww 2013-10-13

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Dear Alessandro, you can use MATLAB function "mean" for this purpose. Here is description: http://www.mathworks.com/help/matlab/ref/mean.html. In Your case just use

mean(A)

Yes, this is what I'm trying to do :D I don't want to bug you, but I'm trying to do this with matrix indexing, because I already do this with a loop, but I have very big matrix and the same operation to be done on different matrix of different sizes...

sixwwwwww 2013-10-13