Hi
On 13/09/2010 7:57 a.m., baptiste auguie wrote:
Oh, right I see. I was completely off then. Maybe it's not so easy to
add<> delimiters after all, I'll have to look at the list of symbol
pieces to see if these can be constructed too.
The plotmath stuff assumes a font with an Adobe Symbol encoding. The
characters we have to play with are shown at
http://www.stat.auckland.ac.nz/~paul/R/CM/AdobeSym.pdf.
You can see the components of "growable" delimiters on the bottom two
rows.
Paul
Thanks,
baptiste
On 12 September 2010 21:42, David Winsemius<dwinsem...@comcast.net> wrote:
On Sep 12, 2010, at 6:15 AM, baptiste auguie wrote:
Thanks everyone. I've also had a look at plotmath.c where bgroup is
defined for "[", "{", "(", "." but not "<". It seems quite trivial to
add it, at first sight, however there is a part that I don't
understand in the RenderDelim routine,
static BBOX RenderDelim(int which, double dist, int draw, mathContext *mc,
pGEcontext gc, pGEDevDesc dd)
{
// [... snipped ...]
case '(':
top = 230; ext = 231; bot = 232; mid = 0;
break;
case ')':
top = 246; ext = 247; bot = 248; mid = 0;
break;
These integer codes make no sense to me, I have no clue which ones I
should use for< and>.
Does this help? (I think they are using Symbol PS fonts with decimal
indexing.)
as.octmode(c(230, 231, 232, 246, 247, 248) )
[1] "346" "347" "350" "366" "367" "370"
plot(1,1, xlab= expression(
symbol("\346")~ # upper 1/3 of left paren
symbol("\347")~ # to left of center bar
symbol("\350")~ # lower 1/3 of left paren
symbol("\366")~ # upper 1/3 of right paren
symbol("\367")~ # to right of center bar
symbol("\370") ) ) # lower 1/3 of right paren
(caveat: Maybe not standard glyph-names.)
I added octal annotation to the TestChars(font=5) call that the points help
page offers:
TestChars(font=5)
for(j in 1:14) {
for(i in 0:16){
text(i+0.2, j+.6, labels=as.octmode(i+(j+1)*16), cex=.5)}}
I do not see a trio or pair of glyphs that would form an angle bracket.
--
David.
As far as I understand these codes might
correspond to extended ascii characters whose boundaries and positions
we want to borrow. Then again, maybe it's something else entirely.
Any hints?
Best wishes,
baptiste
On 12 September 2010 03:27, David Winsemius<dwinsem...@comcast.net>
wrote:
On Sep 11, 2010, at 9:00 PM, Peter Ehlers wrote:
On 2010-09-11 16:14, Dennis Murphy wrote:
Hi Baptiste,
You need to use the symbol("\nnn") concept, where nnn denotes the octal
symbol number. For< it's 074 and for> it's 076. This little test
seemed
to
work:
plot(1, 1, main = expression(symbol("\074")~'x, y'~symbol("\076")))
HTH,
Dennis
It's a matter of taste, but I would use "\341" and "\361".
However, these are still not scalable, AFAICS.
Not exactly scalable angles, but you can fake it:
plot(1, 1, main = expression(symbol("\341")~scriptstyle( atop(x,y)
)~symbol("\361")), cex.main=3)
scriptstyle shrinks the inner atop() material, and since I tested on a
Mac
it should work for Baptiste.
--
David.
-Peter Ehlers
On Sat, Sep 11, 2010 at 10:01 AM, baptiste auguie<
baptiste.aug...@googlemail.com> wrote:
What do people use to show angle brackets< > in R graphics? Have I
missed something obvious?
Thanks,
baptiste
On 9 September 2010 17:57, baptiste auguie
<baptiste.aug...@googlemail.com> wrote:
Dear list,
I read in ?plotmath that I can use bgroup to draw scalable delimiters
such as [ ] and ( ). The same technique fails with< > however, and
I
cannot find a workaround,
grid.text(expression(bgroup("<",atop(x,y),">")))
Error in bgroup("<", atop(x, y),">") : invalid group delimiter
Regards,
baptiste
sessionInfo()
R version 2.11.1 (2010-05-31)
x86_64-apple-darwin9.8.0
David Winsemius, MD
West Hartford, CT
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