Hello I am an R newbie, and am coming against a couple of problems when I try and apply the scale function across all the rows of a matrix.
------------------------- #I have a matrix "dt_l". > str(dt_l) num [1:40962, 1:885] 3.04 4.1 3.4 3.58 3.77 ... #I want to convert the values in each row of this matrix into standardised values (mean 0, sd 1). I believe the command for doing this is "scale()", with the defaults for this function being to set mean at 0 and sd at 1. Therefore, my desired end-point is an object with the same dimensions as dt_l. So, I use this command..which I think should applying scale to every row of matrix dt_l: > dt.stand<-apply(dt_l, 1, scale) #This has led to two different sorts of problem: (1) On some occasions when I have run the command I get an error warning which includes the phrase "error: can't allocate region..." (2) On other occasions (when as far as I know I have entered the same command), it runs. BUT, when I look at the object produced the dimensions are different from dt_l .... > str(dt.stand_l) num [1:885, 1:40962] -0.679 -0.0882 0.1204 1.8571 0.8854 ... ---------------------------- I would be very grateful for any explanations/fixes that can be offered for the above, or any suggestions of alternative ways of reaching my desired end-point. Yours hopefully Armin ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
