Is this what you're looking for?
mymatrix = matrix(rnorm(15),5,3,dimnames=list(NULL,c('x','y','z')))
mymatrix
x y z
[1,] -0.4459162 -2.3936837 -0.7401963
[2,] 0.9886466 -1.3955161 -1.3390314
[3,] -0.2086743 1.7984620 -0.8532579
[4,] 1.0985411 0.9315553 -1.3981632
[5,] 0.5787438 0.1719177 0.2246174
mymatrix[,'y'] = round(mymatrix[,'y'])
mymatrix
x y z
[1,] -0.4459162 -2 -0.7401963
[2,] 0.9886466 -1 -1.3390314
[3,] -0.2086743 2 -0.8532579
[4,] 1.0985411 1 -1.3981632
[5,] 0.5787438 0 0.2246174
- Phil Spector
Statistical Computing Facility
Department of Statistics
UC Berkeley
spec...@stat.berkeley.edu
On Mon, 22 Nov 2010, madr wrote:
round() function affects all values of a matrix, I want only to round column
that is called 'y'.
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