[R] line break in pie chart labels

Peter Dalgaard p.dalgaard at biostat.ku.dk
Thu Sep 28 10:02:41 CEST 2006

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.

   O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
 (*) \(*) -- University of Copenhagen   Denmark          Ph:  (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)                  FAX: (+45) 35327907

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