On Tue, 10 Jun 2008, Barry Rowlingson wrote:
Hua Li wrote:
Hi All,
I have a problem of putting long titles on a graph:
for example,
x= seq(1:100)
y=seq(1:100)
plot(x,y,main="p=0.05:A-B=3,C-D=10,D-E=100,A-F=2,AFR-E=3,ACE-D=1,ADEF-M=0,AED-E=10,DE-F=3,AB-J=4,AC-J=10,ED-F=1,ED-B=4,AF-B=10,CD-S=10,AM-C=4")
R seems not able to print the whole title. The title content might be
changing and thus I don't know how long it is beforehand. Is there a way to
measure the length and then put the title into different lines accordingly?
There's a strwidth() function that gives the width of a string on the
current plot. Note you have to do the plot first so that R knows the
coordinates of the plot, since strwidth returns the width in plot
coordinates. So:
As of R 2.7.0, that is only the default. You can have it in inches, for
example.
t="This is a very long title and I would like to split it somewhere, but if I
split it in the wrong place bad things will happen"
x=(1:10)*100
y=1:10
plot(x,y) # x axis is 1:1000
strwidth(t)
gives:
[1] 2002.939
but
plot(y,x) # x axis is 1:10
strwidth(t)
[1] 20.02939
Now, once you've done your plot you can get the width with:
diff(par()$usr[1:2])
[1] 9.72
and then if strwidth if your title is bigger than that you'll need to split
it into N chunks. Your splitting algorithm will have to be clever if you want
to break a sentence at word spaces though!
Hopefully this is enough to get you going.
Barry
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
--
Brian D. Ripley, [EMAIL PROTECTED]
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.