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.
