Hi, On Sep 18, 2012, at 3:25 PM, Bert Gunter wrote:
> Please read An Introduction to R (or other R tutorial) to learn about > indexing in R. > > ?"[" or ?subset also will tell you how to do it, but they are rather terse. > That's a great start, but it might be helpful to provide a bit more specificity when directing a newcomer like Jose to the Introduction to R. Perhaps by providing a link to the relevant sections like this... Here are nice descriptions of four different ways to index a vector: http://cran.r-project.org/doc/manuals/R-intro.html#Index-vectors These kinds of indexing techniques can be applied to each dimension of an array-like object such as your example. You can see in David Winsemius' nice example that he applied the "logical" type of indexing to the rows of your data. Cheers, Ben > -- Bert > > On Tue, Sep 18, 2012 at 12:08 PM, Jose Narillos de Santos > <narillosdesan...@gmail.com> wrote: >> Hi I have an output data Data.csv >> >> this style: >> >> ,"V1","V2","V3" 1,"-9552","9552","C" 2,"0","9653","0" >> 3,"9614","9614","V" 4,"0","9527","0" 5,"-9752","9752","C" >> 6,"0","9883","0" 7,"0","9865","0" >> I want to create a new matrix ommintg all the rows where third column has >> 0. >> >> There is a way to do it easyly? >> >> Many thanks in advance. >> >> My final matrix will have: >> >> ,"V1","V2","V3"1,"-9552","9552","C" >> 3,"9614","9614","V"5,"-9752","9752","C" >> >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> 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. > > > > -- > > Bert Gunter > Genentech Nonclinical Biostatistics > > Internal Contact Info: > Phone: 467-7374 > Website: > http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm > > ______________________________________________ > 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. Ben Tupper Bigelow Laboratory for Ocean Sciences 180 McKown Point Rd. P.O. Box 475 West Boothbay Harbor, Maine 04575-0475 http://www.bigelow.org ______________________________________________ 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.
