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.
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 > > > ______________________________________________ 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.