[R] factor level issue after subsetting

Dear list, I cannot figure out why, after sub-setting my data, that particular item which I don't want to plot is still in the newly created subset (please see example below). R somehow remembers what was in the original data set. A work around is exporting and importing the new subset. Then it's

Re: [R] factor level issue after subsetting

-Original Message- From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- project.org] On Behalf Of Schreiber, Stefan Sent: Tuesday, November 01, 2011 2:29 PM To: r-help@r-project.org Subject: [R] factor level issue after subsetting Dear list, I cannot figure out why

Re: [R] factor level issue after subsetting

first of all, the subsetting line is overly complicated. dat.sub-dat[dat$treat!='cont',] will work just fine. R does exactly what you're describing. It knows the levels of the factor. Once you remove 'cont' from the data, that doesn't mean that the level is removed from the factor:

Re: [R] factor level issue after subsetting

California, USA http://www.fws.gov/redbluff/rbdd_jsmp.aspx From: Schreiber, Stefan stefan.schrei...@ales.ualberta.ca To: r-help@r-project.org Sent: Tuesday, November 1, 2011 2:28 PM Subject: [R] factor level issue after subsetting Dear list, I cannot figure out why, after sub-setting my data

Re: [R] factor level issue after subsetting

of the Interior US Fish Wildlife Service California, USA http://www.fws.gov/redbluff/rbdd_jsmp.aspx From: Schreiber, Stefan stefan.schrei...@ales.ualberta.ca To: r-help@r-project.org Sent: Tuesday, November 1, 2011 2:28 PM Subject: [R] factor level issue after