Re: [R] Add function to each row excluding certain columns

Hi, Try: !colnames(example1)%in%omit #[1]  TRUE  TRUE  TRUE  TRUE FALSE FALSE  TRUE  TRUE  TRUE  cbind(example1, `MAX without Restriction`=apply(example1[,!colnames(example1)%in% omit],1,max,na.rm=TRUE)) A.K. Thank you again! But somehow the which(function) didn't work... The problem is, tha

Re: [R] Add function to each row excluding certain columns

On Oct 9, 2013, at 3:31 PM, laro wrote: > Thank you again! But somehow the which(function) didn't work... > The problem is, that the columns I want to drop in further calculations will > not have the same name, that's why I'm looking for a solution to make a > vector of the columns that should be

Re: [R] Add function to each row excluding certain columns

Thank you again! But somehow the which(function) didn't work... The problem is, that the columns I want to drop in further calculations will not have the same name, that's why I'm looking for a solution to make a vector of the columns that should be omitted, like omit<-c("Restriction 1","Restricti

Re: [R] Add function to each row excluding certain columns

Hi, No problem. It depends upon how many columns you want to delete, or if they have any common names as in "Restriction" example1<- as.matrix(read.table("example1.txt",header=TRUE,stringsAsFactors=FALSE,sep="\t",row.names=1,check.names=FALSE)) indx<- which(!grepl("Restriction", colnames(example

Re: [R] Add function to each row excluding certain columns

Thank you for the fast answer! Is there any way to use the first solution way, but work with the column names instead of the number of the column. Because in further calculation I need to drop more columns than just the restriction ones and the real dataset has to many columns to work with the pos

Re: [R] Add function to each row excluding certain columns

Hi, Try: example1<- as.matrix(read.table("example1.txt",header=TRUE,stringsAsFactors=FALSE,sep="\t",row.names=1,check.names=FALSE)) example2 <- example1 example1New <- cbind(example1, `MAX without Restriction`=apply(example1[,1:4],1,max,na.rm=TRUE)) #or library(matrixStats) `MAX without Restrict