I'm assuming the column names really are X1 and X2, literally. If so, why not
y1y2_dash <- subset(y1y2, X1 > 0 & X2 > 0) ? Note: Here you need '&', not '&&'. Bill Venables http://www.cmis.csiro.au/bill.venables/ -----Original Message----- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of Roslina Zakaria Sent: Wednesday, 28 January 2009 11:06 AM To: r-help@r-project.org Subject: [R] extract positive pairs Hi, I have a data below and would like to search for positive pairs only and form a new data set. X1 X2 31.0 9.0 11.0 1.0 1.0 0.0 0.0 0.0 8.0 0.0 0.0 0.0 2.0 2.0 18.0 3.0 0.0 0.0 0.0 0.0 0.0 0.0 10.0 0.0 6.0 0.0 ... The new data will be X1' X2' 31.0 9.0 11.0 1.0 2.0 2.0 18.0 3.0 I tried to write the function as: y1y2 <- read.csv("genX1X2.csv", header=FALSE) (y1y2[,1] > 0 ) && (y1y2[,2]>0) cbind(y1y2[,1],y1y2[,2]) Thank you for your help. ______________________________________________ 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.
