yes, this works. It didn't think of concatenating... thanks!
jim holtman wrote: > > zzz <- zzz[-c(1,45,23,321), -c(23,34,45,67)] > > > On 5/8/07, Silvia Lomascolo <[EMAIL PROTECTED]> wrote: >> >> I work on Windows, R version 2.4.1 >> I need to leave out many rows and columns when reading a matrix. The >> 'skip' >> commands in read.table, seem to be just for skipping rows, if I >> understand >> well, but I need to skip many columns as well. I tried something very >> simple >> and left one row and one column out, but I don't know how to do it for >> many >> rows and columns at a time. >> >> Example: >> >> zzz # euclidean distances matrix >> >> X1 X2 X3 X4 X5 >> X1 0 11 12 1 15 >> X2 11 0 5 12 3 >> X3 12 5 0 8 4 >> X4 1 12 8 0 16 >> X5 15 3 4 16 0 >> >> skip.data = zzz [-3, -3] # gives me the same matrix without row 3 and >> column 3... how can I tell R to skip more than one row and column? >> Columns >> and rows to be left out are not contiguous The matrix I'm using is >> fairly >> large (335x335), so excel won't read the whole thing, and it's not a >> fixed-width txt file, so I cannot use read.fwf. I also don't have access >> to >> Unix, as was suggested to other users to solve this problem. >> >> >> -- >> View this message in context: >> http://www.nabble.com/Skipping-rows-and-columns-in-large-matrix-tf3712332.html#a10384400 >> Sent from the R help mailing list archive at Nabble.com. >> >> ______________________________________________ >> [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. >> > > > -- > Jim Holtman > Cincinnati, OH > +1 513 646 9390 > > What is the problem you are trying to solve? > > ______________________________________________ > [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. > > -- View this message in context: http://www.nabble.com/Skipping-rows-and-columns-in-large-matrix-tf3712332.html#a10385469 Sent from the R help mailing list archive at Nabble.com. ______________________________________________ [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.
