Yes, but colMeans, rowMeans, pmax, pmin , etc. are *much* faster.
Cheers,
Bert
Bert Gunter
"The trouble with having an open mind is that people keep coming along
and sticking things into it."
-- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
On Fri, Feb 12, 2016 at 9:15 PM, J
Hi Ashta,
Surely you are aware of the "apply" family of functions that return the
numbers you want:
ashmat<-matrix(c(117,12,13,21,21,32,11,1,65,43,23,7,58,61,78,95 ),
nrow=4,byrow=TRUE)
apply(ashmat,2,mean)
[1] 65.25 37.00 31.25 31.00
apply(ashmat,1,which.max)
[1] 1 2 1 4
Jim
On Sat, Feb 13, 2
hi all,
I have a square matrix (1000 by 1000),
1. I want calculate mean, min and max values for each column and row.
2, I want pick the coordinate value of the matrix that has the max
and min value for each row and column.
This an example 4 by 4 square matrix
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