My mistake, I don't subset like that, I totally got turnaround. "|" should do it, Thanks again Jorge and Joshua Felipe D. Carrillo Supervisory Fishery Biologist Department of the Interior US Fish & Wildlife Service California, USA
----- Original Message ---- > From: Joshua Wiley <jwiley.ps...@gmail.com> > To: Felipe Carrillo <mazatlanmex...@yahoo.com> > Cc: r-h...@stat.math.ethz.ch > Sent: Mon, November 29, 2010 1:11:23 PM > Subject: Re: [R] subset > > Hi Felipe, > > On Mon, Nov 29, 2010 at 1:02 PM, Felipe Carrillo > <mazatlanmex...@yahoo.com> wrote: > > Hi: > > I always use subset the same way but now is returning 0 rows. > > What's wrong with the way I am subsetting? > > > > library(ggplot2) > > structure(list(first = c(38.2086, 43.1768, 43.146, 41.8044, 42.4232, > > 46.3646, 38.0813, 40.0745, 40.4889, 38.6246, 40.2826, 41.6056, > > 34.5353, 40.0768), second = c(43.3295, 42.4326, 38.8994, 37.0894, > > 42.3218, 46.1726, 39.1206, 41.2072, 42.4874, 40.2657, 38.7766, > > 40.8822, 42.0165, 49.2055), third = c(42.24, 42.992, 37.7419, > > 42.3448, 41.9131, 44.385, 42.7811, 44.1963, 40.8088, 43.9634, > > 38.7079, 38.0791, 44.3136, 39.5333)), .Names = c("first", "second", > > "third"), class = "data.frame", row.names = c(NA, -14L)) > > head(x);str(x) > > xmelt <- melt(x) > > names(xmelt) <- c("year","fatPerc") > > str(xmelt);xmelt > > # Subset to plot only the 'first' and third year > > firstyear <- subset(xmelt,year ==' first');str(firstyear) # works > > Really? It does not for me. I think you need to remove the space: ' > first' to 'first' > > > # two variables,,doesn't work > > firstyear <- subset(xmelt,year ==' first' & year == 'third');str(firstyear) > > Same spacing problem, also I wonder if you want | instead of &. & > will mean you are testing for years that are simultaneously the first > AND ( & ) the third, rather than the first OR ( | )the third. See > ?Logic for the distinction (in base, if it asks). > > HTH, > > Josh > > > > > Felipe D. Carrillo > > Supervisory Fishery Biologist > > Department of the Interior > > US Fish & Wildlife Service > > California, USA > > > > > > > > > > ______________________________________________ > > 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. > > > -- > Joshua Wiley > Ph.D. Student, Health Psychology > University of California, Los Angeles > http://www.joshuawiley.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.