Re: [R] sort matrix by sum of columns
Albert Is this what you want?: a[,order(colSums(a))] John S --- -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Albert Vilella Sent: 21 June 2006 11:38 To: r help Subject: [R] sort matrix by sum of columns Hi all, I would like to know how can I sort the cols of a matrix by the sum of their elements. a - matrix(as.integer(rnorm(25,4,2)),10,5) colnames(a) = c(alfa,bravo,charlie,delta,echo) I guess I should use colSums, and then rearrange the matrix somehow according to the result. My idea is to display a sorted barplot: barplot(a, horiz=TRUE, legend.text=T) Thanks in advance, Albert. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] sort matrix by sum of columns
Hi all, I would like to know how can I sort the cols of a matrix by the sum of their elements. a - matrix(as.integer(rnorm(25,4,2)),10,5) colnames(a) = c(alfa,bravo,charlie,delta,echo) I guess I should use colSums, and then rearrange the matrix somehow according to the result. My idea is to display a sorted barplot: barplot(a, horiz=TRUE, legend.text=T) Thanks in advance, Albert. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] sort matrix by sum of columns
probably you're looking for ?order(), e.g., barplot(a[, order(colSums(a))], horiz = TRUE, legend.text = TRUE) I hope it helps. Best, Dimitris Dimitris Rizopoulos Ph.D. Student Biostatistical Centre School of Public Health Catholic University of Leuven Address: Kapucijnenvoer 35, Leuven, Belgium Tel: +32/(0)16/336899 Fax: +32/(0)16/337015 Web: http://med.kuleuven.be/biostat/ http://www.student.kuleuven.be/~m0390867/dimitris.htm - Original Message - From: Albert Vilella [EMAIL PROTECTED] To: r help r-help@stat.math.ethz.ch Sent: Wednesday, June 21, 2006 12:38 PM Subject: [R] sort matrix by sum of columns Hi all, I would like to know how can I sort the cols of a matrix by the sum of their elements. a - matrix(as.integer(rnorm(25,4,2)),10,5) colnames(a) = c(alfa,bravo,charlie,delta,echo) I guess I should use colSums, and then rearrange the matrix somehow according to the result. My idea is to display a sorted barplot: barplot(a, horiz=TRUE, legend.text=T) Thanks in advance, Albert. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] sort matrix by sum of columns
Hi order is your friend On 21 Jun 2006 at 11:38, Albert Vilella wrote: From: Albert Vilella [EMAIL PROTECTED] To: r help r-help@stat.math.ethz.ch Date sent: Wed, 21 Jun 2006 11:38:17 +0100 Subject:[R] sort matrix by sum of columns Send reply to: [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] Hi all, I would like to know how can I sort the cols of a matrix by the sum of their elements. a - matrix(as.integer(rnorm(25,4,2)),10,5) colnames(a) = c(alfa,bravo,charlie,delta,echo) ord-order(colSums(a)) barplot(a[,ord], horiz=TRUE, legend.text=T) HTH Petr I guess I should use colSums, and then rearrange the matrix somehow according to the result. My idea is to display a sorted barplot: barplot(a, horiz=TRUE, legend.text=T) Thanks in advance, Albert. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Petr Pikal [EMAIL PROTECTED] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
