Confirmed.
I might look at it during August, since the underlying code is not that new to me. If Paul (or anybody else from R Core) has not answered yet and there is not already a related bug report in the database, I'd suggest to submit a bug report.
Uwe
Henrik Bengtsson wrote:
Hi, I am not sure if this is a bug or a non-implement feature of text-drawing functions with TeX-style expression, but hat() and some of its equals does not get the right "bounding boxes" if they are put in sub- or superscripts. For instance, for the expression 'b[hat(a)]' the hat() seems to shift 'hat(a)' too much to the right of 'b'. Try the below example and you'll see what I mean:
label <- list( expression((b[sqrt(a)])), expression((b[bar(a)])), expression((b[widehat(a)])), expression((b[widetilde(a)])), expression((tilde(a))), # Problematic: expression((b[dot(a)])), expression((b[ring(a)])), expression((b[hat(a)])), expression((b[tilde(a)])), expression((b^dot(a))), expression((b^ring(a))), expression((b^hat(a))), expression((b^tilde(a))) )
plot(NA, xlim=c(0,2), ylim=c(-1,length(label))) for (kk in seq(label)) text(1,length(label)-kk, label=label[[kk]])
The problem occurs for the postscript and png devices too (I haven't tried the others).
I'm on WindowsXP and "R version 1.9.1, 2004-06-21" (non-patched).
Best wishes
Henrik Bengtsson
Dept. of Mathematical Statistics @ Centre for Mathematical Sciences Lund Institute of Technology/Lund University, Sweden (+2h UTC)
+46 46 2229611 (off), +46 708 909208 (cell), +46 46 2224623 (fax)
h b @ m a t h s . l t h . s e, http://www.maths.lth.se/~hb/
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