HI David, Seems like a closing bracket is needed.
mat[, sample(dim(mat)[2]) ] ^^^ A.K. ----- Original Message ----- From: David Winsemius <[email protected]> To: Haris Rhrlp <[email protected]> Cc: "[email protected]" <[email protected]> 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 ______________________________________________ [email protected] 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. ______________________________________________ [email protected] 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.
