[R] the title is too long for a graph
b.rowlingson at lancaster.ac.uk
Tue Jun 10 18:39:46 CEST 2008
Hua Li wrote:
> Hi All,
> I have a problem of putting long titles on a graph:
> for example,
> x= seq(1:100)
> 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
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"
plot(x,y) # x axis is 1:1000
plot(y,x) # x axis is 1:10
Now, once you've done your plot you can get the width with:
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.
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