Dear Kristi, You could do something like this.
ggplot(dat1, aes(x = factor(site), y = Present)) + geom_boxplot(aes(colour = layer)) + geom_line(data = dat2, aes(group = 1, y = present)) + geom_point(data = dat2, aes(y = present)) Note that - ggplot provides no second axis - the boxplots display the median, not the mean Best regards, 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 + 32 2 525 02 51 + 32 54 43 61 85 thierry.onkel...@inbo.be www.inbo.be 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 -----Oorspronkelijk bericht----- Van: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] Namens Kristi Glover Verzonden: maandag 27 januari 2014 12:13 Aan: R-help Onderwerp: [R] Overlaying two graphs using ggplot2 in R Hi R Users, I was struggling to overlay two graphs created from the two different dataset using ggplot2. Furthermore, I could not join means of the box plots. I tried this way but did not work. Any suggestions? dat1<-structure(list(site = c(1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 2L, 2L, 3L, 3L, 3L, 3L, 3L, 3L, 3L), layer = structure(c(2L, 2L, 2L, 1L, 1L, 1L, 2L, 2L, 2L, 1L, 1L, 1L, 2L, 2L, 2L, 1L, 1L, 1L, 1L), .Label = c("bottom", "top"), class = "factor"), Present = c(120L, 125L, 123L, 23L, 21L, 19L, 131L, 124L, 127L, 24L, 27L, 25L, 145L, 143L, 184L, 29L, 14L, 17L, 38L)), .Names = c("site", "layer", "Present"), row.names = c(NA, 19L), class = "data.frame") dat1 dat2<-structure(list(site = 1:3, present = c(-3L, 2L, 5L)), .Names = c("site", "present"), row.names = c(NA, 3L), class = "data.frame") dat2 library("plyr") library(ggplot2) A<-ggplot(dat1, aes(x = factor(site), y = Present, colour = layer, fill=layer)) + geom_boxplot(outlier.shape = 16, outlier.size = 1) + theme_bw()+ ylim(0,185) # Here I wanted to join the means of the boxplots among the sites, but I could not join it. B<-ggplot(dat2, aes(x=factor(site),y= present, colour="blue") + geom_line() + geom_point()) # wanted to plot it using second y axis. A+B Thanks for your help. KG [[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. * * * * * * * * * * * * * D I S C L A I M E R * * * * * * * * * * * * * Dit bericht en eventuele bijlagen geven enkel de visie van de schrijver weer en binden het INBO onder geen enkel beding, zolang dit bericht niet bevestigd is door een geldig ondertekend document. The views expressed in this message and any annex are purely those of the writer and may not be regarded as stating an official position of INBO, as long as the message is not confirmed by a duly signed document. ______________________________________________ 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.
