Thanks a lot! best
On Thu, Nov 1, 2012 at 8:19 AM, D. Rizopoulos <d.rizopou...@erasmusmc.nl>wrote: > try this: > > l <- list(c(1,2,3,7), c(3,4,5,6,3), c(4,2,5,7), c(2,4,6,3,2), c(3,5,7,2)) > > sapply(l, head, 4) > > > I hope it helps. > > Best, > Dimitris > > > On 11/1/2012 9:11 AM, Al Ehan wrote: > > Hi, > > > > I have this lame question. I want to convert a list (each with varies in > > length) to matrix with same row length by eliminating vectors outside the > > needed range. > > For example: > > > > l<-list(NULL) > > l[[1]]=1,2,3.7 > > l[[2]]=3,4,5,6,3 > > l[[3]]=4,2,5,7 > > l[[4]]=2,4,6,3,2 > > l[[5]]=3,5,7,2 > > > > > > #so say I want to only have 4 rows and 5 column in my matrix (or > > data.frame) and eliminating the 5th index value in l[[2]] and l[[4]] > > #what is the simplest code would be? I actually have hundreds of the list > > components. > > > > thanks > > > > [[alternative HTML version deleted]] > > > > ______________________________________________ > > 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. > > > > -- > Dimitris Rizopoulos > Assistant Professor > Department of Biostatistics > Erasmus University Medical Center > > Address: PO Box 2040, 3000 CA Rotterdam, the Netherlands > Tel: +31/(0)10/7043478 > Fax: +31/(0)10/7043014 > Web: http://www.erasmusmc.nl/biostatistiek/ [[alternative HTML version deleted]] ______________________________________________ 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.
