[R] loop command to matrix

[Rui Barradas]

Hello,

Try

x <- matrix(1:18, ncol = 6)
sapply(seq_len(ncol(x)), function(i) x[, i] - rowMeans(x[, -i]))


Hope this helps,

Rui Barradas
Em 27-11-2012 17:51, eliza botto escreveu:
> Dear UseRs,Extremely sorry for a basic question. I have a matrix of 19 rows and 365 columns. what i want to do is the following...First i want to leave out column number 1 and want to calculate the row wise mean of the remaining columns, which will obviously give me 365 values in one column, and then subtracting these values from the column i left out i.e. col=1 then i want to leave out column 2 and calculate the row wise mean of the remaining columns which includes column 1 too and then subtracting these values from the column i left out i.e. col=2.and then continuing this process the last column. i know a kind of "manual way" of doing things but its extremely long and laborious.Is there any loop command or shorter way??
> thanks in advanceregardseliza  		 	   		
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