Oops, I mixed up rbind and cbind. If LIST consists of n numeric vectors, each of length p, try matrix(unlilst(LIST, use.names=FALSE), nrow=n, byrow=TRUE)
Bill Dunlap Spotfire, TIBCO Software wdunlap tibco.com > -----Original Message----- > From: William Dunlap > Sent: Sunday, August 28, 2011 6:57 PM > To: 'Steven Bauer'; r-help@r-project.org > Subject: RE: [R] parallel rbind > > If you know much about what the elements of LIST look like > you can speed things up by not making R figure out what > you already know. E.g., if you know that LIST consists of > p numeric vectors, all of the same length, n, then the following > might be faster > matrix(unlist(LIST, use.names=FALSE), nrow=n) > If you are worried about row or column names then you can > add that information to the call to matrix(). (The above > will also work if LIST contains some matrix elements, as long as > they all have n rows.) > > Bill Dunlap > Spotfire, TIBCO Software > wdunlap tibco.com > > > -----Original Message----- > > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On > > Behalf Of Steven Bauer > > Sent: Sunday, August 28, 2011 5:36 PM > > To: r-help@r-project.org > > Subject: [R] parallel rbind > > > > As I am sitting here waiting for some R scripts to run...I was > > wondering... is there any way to parallelize rbind in R? > > > > I wait for this call to complete frequently as I deal with large > > amounts of data. > > > > do.call("rbind", LIST) > > > > ______________________________________________ > > 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.
