On Oct 30, 2012, at 5:34 PM, arun wrote: > HI David, > > Seems like a closing bracket is needed. > > mat[, sample(dim(mat)[2]) ] >
Actually a closing paren: set.seed(123) mat[, sample(dim(mat) ) [2] ] > ^^^ ^^^ > A.K. > > > > > ----- Original Message ----- > From: David Winsemius <dwinsem...@comcast.net> > To: Haris Rhrlp <haris_r_h...@yahoo.com> > Cc: "R-help@r-project.org" <R-help@r-project.org> > Sent: Tuesday, October 30, 2012 6:51 PM > Subject: Re: [R] Swap rows and columns in a matrix > > > On Oct 30, 2012, at 11:59 AM, Haris Rhrlp wrote: > >> Dear R users, >> >> I want a help to write an algorithm for swapping rows and columns in a matrix >> > > This will "shuffle" columns, although 'randomly permute' is the more common > word for this;operation: > > set.seed(123) > mat[, sample(dim(mat)[2] ] > > This will swap rows: > > set.seed(123) > mat[ sample(dim(mat)[1], ] > > -- > David Winsemius, MD > Alameda, CA, USA > > ______________________________________________ > 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. > David Winsemius, MD Alameda, CA, USA ______________________________________________ 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.
