Thanks Jim and Ben. Allen
On Nov 12, 2007 3:43 PM, Benilton Carvalho <[EMAIL PROTECTED]> wrote: > it's defined in Biobase. > > > On Nov 12, 2007, at 3:30 PM, affy snp wrote: > > > Thanks Jim. It is way simple. Great. > > Is there any function like rowMedians() which > > could take the median value across samples? > > > > Allen > > > > On Nov 12, 2007 3:10 PM, jim holtman <[EMAIL PROTECTED]> wrote: > >> Try something like this: > >> > >> myAvg <- rowMeans(A[,48:243]) > >> B <- A[1:47,] / myAvg > >> > >> > >> On Nov 12, 2007 1:37 PM, affy snp <[EMAIL PROTECTED]> wrote: > >>> Dear list, > >>> > >>> Hi! I have a table A, 238304 rows and 243 columns (representing > >>> samples). First of all, I would like to pool a group of samples > >>> from 48th column to 243rd column and take the average across > >>> them and make a single column,saying as the reference column. > >>> > >>> Second, I want to use each column of first 47 columns in table > >>> A divided by the reference column and end up with a new table > >>> B with 238304 rows and 47 columns. > >>> > >>> Is there any simple code which especially could do sth like > >>> reference_column<-(A[,48]+A[,49]+...A[,243])/196 > >>> and B<-A[,1:47]/reference_column? > >>> > >>> Thank you very much for your help! > >>> > >>> Best, > >>> Allen > >>> > >>> ______________________________________________ > >>> 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. > >>> > >> > >> > >> > >> -- > >> Jim Holtman > >> Cincinnati, OH > >> +1 513 646 9390 > >> > >> What is the problem you are trying to solve? > >> > > > > ______________________________________________ > > 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. > ______________________________________________ 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.