On 2010-12-18 10:27, e-letter wrote:
On 18/12/2010, Peter Ehlers<ehl...@ucalgary.ca> wrote:
On 2010-12-18 07:50, e-letter wrote:
Ben Bolker
Sat, 18 Dec 2010 07:07:24 -0800
[... snip ...]
I am trying to create a chart like this
(http://www.b-eye-network.com/images/content/Fig4_3.jpg); so this is
not possible using R?
That looks an awful lot like what lattice's dotplot would
produce. So: have you tried dotplot() as Ben has suggested?
For the benefit of other novices, this is what I did (gnu/linux):
sign-in to a command terminal as root
start R
install.packages("reshape2")
In another terminal as normal user
require(reshape2)
mdot<-melt(testdot)
dotplot(value~category,groups=variable,data=mdot)
The resultant graph shows the categories on the abscissa and there
does not seem to be a way of selecting two columns from the original
matrix. It is not like the graph cited in the hyperlink quoted above,
but at least I have successfully followed instructions!
It seems to me that you're getting exactly the plot referred
to by the link, except that you have a factor with 4 levels, not 2.
I changed the axes with the command:
dotplot(category~value,groups=variable,data=mdot)
I believe there is a command to select only certain rows of data which
I think will achieve the desired graph, if unable I'll ask again, so
thank you all.
See if the 'subset=' argument works for you:
dotplot(category ~ value, groups = variable, data = mdot,
subset = {variable %in% c("values1", "values2")},
pch = c(1,3), cex = 1.5)
Peter Ehlers
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