Then please read ?plotmath and use it:
labels = expression("" >= 0.66, "" == 0.33, "" <= -0.33, "" <= -0.66)
pie(1:3,lab="")
text(locator(3),lab=expression("">=1,""=2,""<=3))
Error: attempt to use zero-length variable name
text(locator(3),lab=expression(NULL>=1,NULL=2,NULL<=3))
What 's the problem come from?
It seems that NULL>=something is prefered to "">=something,isn't it?
version
_
platform i386-pc-mingw32
arch i386
os mingw32
system i386, mingw32
status
major 2
minor 3.0
year 2006
month 04
day 24
svn rev 37909
language R
version.string Version 2.3.0 (2006-04-24)
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--
黄荣贵
Deparment of Sociology
Fudan University
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