Here is the answer: http://rpubs.com/INBOstats/zoom_in
ir. Thierry Onkelinx Instituut voor natuur- en bosonderzoek / Research Institute for Nature and Forest team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance Kliniekstraat 25 1070 Anderlecht Belgium To call in the statistician after the experiment is done may be no more than asking him to perform a post-mortem examination: he may be able to say what the experiment died of. ~ Sir Ronald Aylmer Fisher The plural of anecdote is not data. ~ Roger Brinner The combination of some data and an aching desire for an answer does not ensure that a reasonable answer can be extracted from a given body of data. ~ John Tukey 2015-07-20 22:19 GMT+02:00 Jacob Wegelin <jacobwege...@fastmail.fm>: > On 2015-07-20 Mon 15:19, Thierry Onkelinx wrote: > >> >> Limits in scales set values outside the limits to NA. Hence the boxplots, >> smoothers,... change. Use coord_cartesian() to "zoom in". >> > > Thanks. What do I do if I also want to use coord_flip(), that is, if I > want the boxes to lie horizontally *and* to zoom in? > > myplot+coord_cartesian(ylim=mylimits) # zooms in > > myplot+coord_cartesian(ylim=mylimits) + coord_flip() # flips but does not > zoom > > myplot + coord_flip()+coord_cartesian(ylim=mylimits) # zooms but does not > flip > > Jacob Wegelin > > > Op 20-jul.-2015 20:29 schreef "Jacob Wegelin" <jacobwege...@fastmail.fm>: >> > >> > With base graphics, one can use the "ylim" argument to zoom in on a >> boxplot. >> > >> > With ggplot2, using "limits" to try to zoom in on a boxplot *changes >> the box*. Since the box usually indicates the 25th and 75th percentiles of >> a >> quantitative variable, this is puzzling. >> > >> > The toy code below demonstrates this. In ggplot2, "zooming in" causes >> the two boxes to overlap, when they did not overlap in the full plot. >> Also, the >> center lines --- which usually indicate the median of the variable --- >> change when one zooms in. >> > >> > In base graphics, "zooming in" does not cause the boxes to overlap or, >> as far as I can see, the median line to move relative to the scale. >> > >> > What is going on here? >> > >> > pdf(file="toy-example.pdf") >> > set.seed(1) >> > toy1<-data.frame(Y=rnorm(500, mean=3), A="one") >> > toy2<-data.frame(Y=rnorm(500, mean=1.6), A="two") >> > toy<-rbind(toy1,toy2) >> > toy$A<-factor(toy$A) >> > library(ggplot2) >> > mybreaks<-signif(seq(from=min(toy$Y),to=max(toy$Y),by=0.5),digits=2) >> > mylimits<-c(0.61,3.7) >> > print(myplot<-ggplot(toy, aes(x=A,y=Y)) + >> geom_boxplot()+scale_y_continuous(breaks=mybreaks)+theme_bw()) >> > print(myplot+scale_y_continuous(breaks=mybreaks,limits=mylimits)) >> > boxplot(toy1$Y,toy2$Y) >> > boxplot(toy1$Y,toy2$Y, ylim=mylimits) >> > graphics.off() >> > >> >> sessionInfo() >> > >> > R version 3.2.1 (2015-06-18) >> > Platform: x86_64-apple-darwin13.4.0 (64-bit) >> > Running under: OS X 10.10.4 (Yosemite) >> > >> > locale: >> > [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8 >> > >> > attached base packages: >> > [1] stats graphics grDevices utils datasets methods base >> > >> > other attached packages: >> > [1] ggplot2_1.0.1 >> > >> > loaded via a namespace (and not attached): >> > [1] MASS_7.3-40 colorspace_1.2-6 scales_0.2.5 magrittr_1.5 >> plyr_1.8.3 tools_3.2.1 gtable_0.1.2 reshape2_1.4.1 >> > [9] Rcpp_0.11.6 stringi_0.5-5 grid_3.2.1 stringr_1.0.0 >> digest_0.6.8 proto_0.3-10 munsell_0.4.2 >> > >> > >> > Jacob A. Wegelin >> > >> > ______________________________________________ >> > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >> > 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. >> >> >> [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
