Re: [R] ggplot2-barplot

From: ONKELINX, Thierry <>
Date: Mon, 23 Jun 2008 11:01:47 +0200

Dear Felipe,

Is this what you want?

mydata <- data.frame(PondName = factor(LETTERS[1:5]), avgWt = rnorm(5, mean = 10, sd = 3))
ggplot(mydata, aes(x = PondName, y = avgWt)) + geom_bar() ggplot(mydata, aes(x = PondName, y = avgWt, fill = PondName)) + geom_bar()

HTH, Thierry

ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature and Forest
Cel biometrie, methodologie en kwaliteitszorg / Section biometrics, methodology and quality assurance
Gaverstraat 4
9500 Geraardsbergen
tel. + 32 54/436 185

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: [] Namens Felipe Carrillo
Verzonden: maandag 23 juni 2008 2:09
Onderwerp: [R] ggplot2-barplot

Hi all:
I have been using ggplot2 graphics for quite some time now and I really like it. However, I haven't used barplots enough to understand the arquitecture behind it. Can someone show me how to make this simple barplot graph with ggplot2? I want "PondName" along the x axis and "avgWt" along the Y axis which represents the avgWt by each Pond.

PondName	avgWt
Pond01	21.5
Pond02	17.8
Pond03	17.8
Pond04	17.8
Pond05	16.375
Pond06	21.5
Pond07	21.5

Using sigmaplot or Excel is a simple task but I can't get it to work with ggplot2. I was trying:

qplot(PondName,data=mydata,geom="bar") + geom_bar(fill=factor(PondName)) but I don't get the desired results. Thanks mailing list PLEASE do read the posting guide and provide commented, minimal, self-contained, reproducible code. mailing list PLEASE do read the posting guide and provide commented, minimal, self-contained, reproducible code. Received on Mon 23 Jun 2008 - 09:03:47 GMT

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.2.0, at Mon 23 Jun 2008 - 20:32:58 GMT.

Mailing list information is available at Please read the posting guide before posting to the list.

list of date sections of archive