From: Henrik Bengtsson <hb_at_maths.lth.se>

Date: Wed 28 Jul 2004 - 03:12:14 EST

# Problematic:

)

R-devel@stat.math.ethz.ch mailing list

https://www.stat.math.ethz.ch/mailman/listinfo/r-devel Received on Wed Jul 28 03:18:25 2004

Date: Wed 28 Jul 2004 - 03:12:14 EST

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/

R-devel@stat.math.ethz.ch mailing list

https://www.stat.math.ethz.ch/mailman/listinfo/r-devel Received on Wed Jul 28 03:18:25 2004

*
This archive was generated by hypermail 2.1.8
: Fri 18 Mar 2005 - 08:59:14 EST
*