Hi Jim, Thanks for your reply. Your codes does work but I was hoping to find a way to use lapply and avoid the for loop.
Lorenzo -----Original Message----- From: Jim Lemon [mailto:j...@bitwrit.com.au] Sent: Monday, 17 May 2010 8:27 PM To: Lorenzo Cattarino Cc: r-help@r-project.org Subject: Re: [R] applying quantile to a list using values of another object as probs On 05/17/2010 06:01 PM, Lorenzo Cattarino wrote: > Hi r-users, > > I have a matrix B and a list of 3x3 matrices (mylist). I want to > calculate the quantiles in the list using each of the value of B as > probabilities. > > > > The codes I wrote are: > > > > B<- matrix (runif(12, 0, 1), 3, 4) > > mylist<- lapply(mylist, function(x) {matrix (rnorm(9), 3, 3)}) > > > > for (i in 1:length(B)) > > { > > quant<- lapply (mylist, quantile, probs=B[i]) > > } > > > > But quant returned the quantiles calculated using only the last value > ([3,3]) of the matrix B. > > Hi Lorenzo, This works for me: B<-matrix (runif(12,0,1),3,4) mylist<-list() for(i in 1:3) mylist[[i]]<-matrix(rnorm(9),3,3) myq<-list() for(i in 1:3)myq[[i]]<-quantile(mylist[[i]],probs=B[i,]) Although looking at your example, I may have misunderstood what you want the result to be. Jim ______________________________________________ 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.
