One way to solve this can be like this:
par(mfrow=c(1,3)) with(data, by(1:nrow(data), Type, function(x) boxplot(Locus[x]~data[x]))
Hope this works for you.
Ivar
On Tue, 24 Aug 2004 07:27:57 +0100 (BST), Prof Brian Ripley <[EMAIL PROTECTED]> wrote:
On Tue, 24 Aug 2004, Paul Boutros wrote:
Hello,
I have a data-frame in which one-column is a factor:
> str(data);
`data.frame': 194 obs. of 8 variables:
$ Type : Factor w/ 3 levels "Nuclear-Rec..",..: 1 2 2 2 2 2 2 2 2 2
...
$ Locus : num 0.000571 0.004000 0.001429 0.004857 0.007429 ...
And I'd like to make a boxplot of the data$Locus values, where each level of
the factor gets its own box-and-whiskers plot. I'm weak in R, but I thought
there might be some shortcut to automating this instead of just creating a
new data-structure with all the separate values?
There are two. The simpler is
boxplot(Locus ~ Type, data=data)
and you can also use
with(data, boxplot(split(Locus, Type)))
(split() does automate the construction of a suitable data structure.)
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