[R] line break in pie chart labels

[Peter Dalgaard]

Jim Lemon <jim at bitwrit.com.au> writes:


> > Given a pie chart with some really long labels can R insert line breaks
> > here? Why I imagine is getting a label displayed as

> pie(1:4,labels=c("The first\nlong label",
>   "The second, even\nlonger label",
>   "The third, quite\nboring and\nstill longer\nlabel",
>   "The fourth, final\nflagrantly\nverbose and\nlongest label\nof the lot"))

In 2.4.0-to-be pie() is happier with plotmath labels, so atop() could
have be another solution. In 2.3.1

> pie(c(2,3),labels=expression(pi_1,pi_2))
Error in lab != "" : comparison is not allowed for expressions
In addition: Warning message:
is.na() applied to non-(list or vector) in: is.na(lab <- labels[i])

but in the prerelease versions, you get to eat you pie() and have your
pi's too.


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