How do you find the average of specific columns for all rows?
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Anonymous Matrix
on 21 Feb 2017
Commented: Anonymous Matrix
on 21 Feb 2017
say like I have this 2D matrix
1 2 3 4 5 6
7 8 9 10 11 12
13 14 15 16 17 18
19 20 21 22 23 24
how do I find the average/mean for all of the rows but only for columns 1,2, and 6?
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Accepted Answer
Jos (10584)
on 21 Feb 2017
Select the columns, and then perform the operation:
A = magic(6)
B = A(:,[1 2 6])
meanVal = mean(B,2)
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