Tena koe Steve
Convert your data into a matrix:
dataMat <- matrix(c(bline_precip[10,9], bline_runoff[10,9],
cccma_precip[10,9], cccma_runoff[10,9],
csiro_precip[10,9], csiro_runoff[10,9],
ipsl_precip[10,9], ipsl_runoff[10,9],
mpi_precip[10,9], mpi_runoff[10,9],
ncar_precip[10,9], ncar_runoff[10,9],
ukmo_precip[10,9], ukmo_runoff[10,9]), nrow=2)
Since I don't know the nature of your data I will use a simple example:
dataMat <- matrix(1:14, nrow=2)
barplot(dataMat, beside=TRUE, space=c(0,2))
tTicks <- barplot(dataMat, beside=TRUE, space=c(0,2))
tTicks <- tapply(tTicks, rep(1:7, each=2), mean)
axis(1, tTicks, letters[1:7])
Is that what you want?
HTH ....
Peter Alspach
-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
project.org] On Behalf Of Steve Murray
Sent: Thursday, 13 January 2011 12:14 p.m.
To: r-help at r-project.org
Subject: [R] Grouped bars in barplot
Dear all,
I am trying to make a barplot with clustered pairs of bars, using
class=numeric data and the following command:
barplot(c(bline_precip[10,9], bline_runoff[10,9], cccma_precip[10,9],
cccma_runoff[10,9], csiro_precip[10,9], csiro_runoff[10,9],
ipsl_precip[10,9], ipsl_runoff[10,9], mpi_precip[10,9],
mpi_runoff[10,9], ncar_precip[10,9], ncar_runoff[10,9],
ukmo_precip[10,9], ukmo_runoff[10,9]), beside=TRUE, space=c(0,2))
This results in all bars being packed tightly together, but with no gap
between each pair. I suspect the problem is something to do with the
data not being a matrix, but I've tried using as.matrix for each data
element and this doesn't seem to work. If any one has any suggestions
I'd be very grateful to hear them.
Also, I'm hoping to put a label beneath each pair of bars on the x-
axis, in the centre. At present I can only get labels to appear
directly underneath a single bar, as opposed to the centre of the pair
of bars. Does anyone have any suggestions for solving this?
Many thanks for any help offered.
Steve
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