[R] help with bwplot
hadley wickham
h.wickham at gmail.com
Tue Feb 12 21:18:50 CET 2008
> I have following data set, which I want to plot the "Scale" variable on the
> x-axis and "Mean"´on the y-axis for each Ageclass and for each sex. The Mean
> value of each Ageclass for each sex would be connected by a line. Totally,
> there should be 6 lines, from which three present the Mean values of each
> Ageclass for respective sex. Are there any easy ways to do this in R?
Maybe something like:
install.packages("ggplot2")
library(ggplot2)
qplot(Scale, Mean, data=df, colour=Sex, linetype = Ageclass,
geom="line", group=interaction(Sex, Ageclass))
The only possibly non-intuitive thing is the group variable - this
specifies the that you want a single line for each combination of sex
and ageclass. The default is to draw a line for each combination of
all of the categorical variables, which doesn't work here because the
x axis is categorical. You might also want to do:
df <- transform(df, Scale = reorder(Scale, Mean))
which orders scale in ascending order of mean Mean.
You can find out more about ggplot2 at http://had.co.nz/ggplot2
Hadley
--
http://had.co.nz/
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