Hi James, On Tue, Jun 7, 2011 at 5:12 PM, James Rome <jamesr...@gmail.com> wrote: > Times is extracted from a larger data frame with the city in it also, so > the variables are not unique. But I tried what you suggested, and get >> pp2 = qplot(time, error, times) >> pp2 = pp2 + facet_wrap(~ runway) >> print(pp2) > Error in eval(expr, envir, enclos) : object 'error' not found
That is _not_ what I suggested. I said pp2 = qplot(time, error, data = times) pp2 + facet_wrap(~ runway) You are missing the data = part. > > So I am confused. > > Thanks, > Jim > On 6/7/2011 4:12 PM, Ista Zahn wrote: > > Hi James, > Specify data = times in the qplot call and get rid of times$ > everywhere. For example, do > > pp2 = qplot(time, error, data = times) > pp2 + facet_wrap(~ runway) > > Best, > Ista > On Tue, Jun 7, 2011 at 4:01 PM, James Rome <jamesr...@gmail.com> wrote: > >> I have a data frame (attached) that has interpolated EOT errors for >> each minute before flight landing. It also has the runway and an index >> for the flight: >> >>>> times[1:4,] >> time error runway flight >> 1 0 -0.02206235 04R 1 >> 2 1 -0.07961631 04R 1 >> 3 2 -0.13795380 04R 1 >> 4 3 -0.20726073 04R 1 >> >>>> sapply(times, class) >> time error runway flight >> "numeric" "numeric" "factor" "factor" >> >> I want to plot this using ggplot2 >> library(ggplot2) >> pp2 = qplot(times$time, times$error, times) >> pp2 = pp2 + facet_wrap(~ times$runway) >> print(pp2) >> But when I try it, I get the error >> Error in fix.by(by.x, x) : 'by' must specify valid column(s) >> I get the same error if I make times$time a factor: >> >>>> times$time = as.factor(times$time) >>>> sapply(times, class) >> time error runway flight >> "factor" "numeric" "factor" "factor" >> >>>> pp2 = qplot(times$time, times$error, times) >>>> pp2 = pp2 + facet_wrap(~ times$runway) >>>> print(pp2) >> Error in fix.by(by.x, x) : 'by' must specify valid column(s) >> >> What am I doing wrong? >> >> And I really want to make a boxplot for every minute of times$time, but >> when I try that, I get one single box. >> >> Thanks for the help, >> Jim >> >> >> ______________________________________________ >> 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. >> >> > > > > -- Ista Zahn Graduate student University of Rochester Department of Clinical and Social Psychology http://yourpsyche.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.
