Dear Erik, Thanks! The 'data' is matrix but all(apply(data[,3:85], 2, class) == "numeric") is false.
> class(data) [1] "matrix" > a<- rowMeans(data[,3:85],na.rm = TRUE) Error in rowMeans(data[, 3:85], na.rm = TRUE) : 'x' must be numeric > all(apply(data[,3:85], 2, class) == "numeric") [1] FALSE > What else should I do? I appreciate! Allen On Thu, Jun 12, 2008 at 4:55 PM, Erik Iverson <[EMAIL PROTECTED]> wrote: > Hello - > > ss wrote: > >> Hi all, >> >> I have a matrix called 'data', which looks like: >> >> data[1:4,1:4] >>> >> Probe_ID Gene_Symbol M1601 M1602 >> 1 A_23_P105862 13CDNA73 -1.6 0.16 >> 2 A_23_P76435 15E1.2 0.18 0.59 >> 3 A_24_P402115 15E1.2 1.63 -0.62 >> 4 A_32_P227764 15E1.2 -0.76 -0.42 >> >>> dim(data) >>> >> [1] 23963 85 >> >> > Do you really have a matrix, or a data.frame? > > Try > > > class(data) > > > What I want to do is to make a new matrix called 'data2', which would be >> transformed >> by subtracting the mean of each row from matrix 'data'. There are some >> 'NA's >> in the >> matrix and I do want to keep it. >> > > See ?scale > > >> I tried to take 'mean's from each row first by using: >> >> a<- rowMeans(data[,3:85],na.rm = FALSE) >> >> but I got: >> >> a<- rowMeans(data[,3:85],na.rm = FALSE) >>> >> Error in rowMeans(data[, 3:85], na.rm = FALSE) : 'x' must be numeric >> >> Can anybody suggest me how to get around this? >> > > Figure out what you are giving the rowMeans function. > If you really have a matrix, then > > all(apply(data[,3:85], 2, class) == "numeric") should be TRUE. > > > > >> Thank you very much! >> >> Allen >> >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> 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. >> > [[alternative HTML version deleted]] ______________________________________________ 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.
