Re: [R] multiply each row in a matrix with the help of the for loop

g] on behalf of arun [smartpink...@yahoo.com] Sent: Tuesday, November 13, 2012 15:25 To: Haris Rhrlp Cc: R help Subject: Re: [R] multiply each row in a matrix with the help of the for loop HI, May be this helps: list1<-lapply(lapply(1:3,function(i) {aa[1:i,,i]<-a[1:i,]*-1 return(aa[,,i])})

Re: [R] multiply each row in a matrix with the help of the for loop

HI, May be this helps: list1<-lapply(lapply(1:3,function(i) {aa[1:i,,i]<-a[1:i,]*-1  return(aa[,,i])}),function(x) apply(x,2,function(i) ifelse(i==0,1,x))) res<-array(unlist(list1),dim=c(nrow(list1[[1]]),ncol(list1[[1]]),length(list1)))  res #, , 1 #  #    [,1] [,2] [,3] #[1,]   -1   -1   -1 #[2