[R] Splitting data in to multiple boxplots

[Martyn Byng]

Hi,

Something like

bb =
data.frame(label=c("a","b","a","b","c","a","b","c"),val=c(4,2,1,6,4,3,2,
1))
l = split(bb,bb$label)
par(mfrow=c(2,2))
lapply(l,function(a) {boxplot(a$val)})

might be what you are looking for

Martyn

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of deadlyspider
Sent: 29 September 2010 11:02
To: r-help at r-project.org
Subject: Re: [R] Splitting data in to multiple boxplots


Ok, I don't think I was specific enough.

The data originally came in this form


1  a  12
2  b  4
3  a  3
4  c  54
5  a  12
6  b  11
7  c  9
8  c  2
.  .  .
.  .  .
.  .  .



Where I sorted by the second column (NB the second column is the
categories
and they have long names). I would then like separate boxplots for each
category.

The loop idea would be nice but unfortunately I do not fully understand
the
answer given.

Thanks.
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