Lookup: ?diag ?upper.tri ?lower.tri
Example: my.mat<-matrix(1:16,ncol=4) my.mat my.mat[upper.tri(my.mat)]<-3 my.mat -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of kevinchang Sent: 01 October 2007 17:37 To: r-help@r-project.org Subject: [R] function for special matrix design Hi All, I am trying to make a matrix with a particular value for all the elements above and including diagonal and another particular value for all the elements below diagonal. Obviously , Matrix function in Matrix package does not work since it only allow filling by either row or column. So I am wondering if there is a built-in function allowing me to do this ? please help. Thanks -- View this message in context: http://www.nabble.com/function-for-special-matrix-design-tf4549437.html#a12982709 Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
