Have sorted it, it was simple, for anyone else who needs it: z[2] <- z[2]*z[2]
squares the second column of a data table and writes it back to the second column Kenny Kenny Larsen wrote: > > Hi, > > A fairly basic problem I think, here although searching the inetrnet > doesn't seem to reveal a solution. I have a dataset with two columns of > real numbers. It is read in via read.table. I simply need to square the > data in the second column and then plot it. I have tried extracting the > second column (b <- z[2]) and then squaring it and merging it to a > variable which is the first column extracted. Firstly thsi seems very > convoluted, secondly it gives a seg fault (I'm guessing because memory > hasn't been allocated for the second column on the creation of teh first > variable). > > So any ideas about the easy way of doing the matsh so I can then just use > plot(z, .....) as before? > > Cheers in advance, > > Kenny > -- View this message in context: http://www.nabble.com/Squaring-one-column-of-data-tp23997104p23997558.html 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.
