From: Peter Dalgaard <p.dalgaard_at_biostat.ku.dk>

Date: Tue 30 May 2006 - 23:21:24 EST

Date: Tue 30 May 2006 - 23:21:24 EST

Robert Lundqvist <Robert.Lundqvist@ltu.se> writes:

> Is there any simple way to add text to the x axis in R? I have tried to

*> add simple characters in R without any greater sucess. As an example of
**> what I want to do is the added C in the following "dumb" plot (produced
**> with MacAnova using the option "dumb:T"):
**>
**> ++------+-------+------+-------+------+-------+------+-------++
**> 1+ : *+
**> | : * * |
**> | : * * |
**> | : * . |
**> 0.8+ : * . +
**> | : . |
**> | : * . |
**> | : * . |
**> 0.6+ : . +
**> | : * . |
**> | * . |
**> | : . |
**> | * : . |
**> 0.4+ : . +
**> | * : . |
**> | * : . |
**> | : . |
**> 0.2+ * : . +
**> | * : . |
**> | * * : . |
**> |* * * : . |
**> 0++------+-------+------+-------+------+-------+--.---+-------++
**> -2 -1.5 -1 -0.5 0 0.5 1 C 1.5 2
**>
**>
**> My attempts to use locator() and text() in R's plot() has not been working
**> as good as expected. Never really knows where the added symbols end up...
*

mtext() is your friend.

> BTW, anyone who knows how such "dumb" plots could be achieved in R? This

*> option is avaliable in S, so a port to R shouldn't be impossible, should
**> it? Don't know how to do it myself however...
*

Presumably you "just" need someone to write a device driver for it. The structure of those is somewhat different from S, so it's not a straightforward port (even if the S code was publically available). As I recall it (fortunately, it was decades ago), some cosmetic issues become tricky due to the high granularity of such line printer plots; things like alignment of strings and continuation of polylines. However if someone wants to read up on Bresenham's line drawing algorithm and all that...

-- O__ ---- Peter Dalgaard ุster Farimagsgade 5, Entr.B c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk) FAX: (+45) 35327907 ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.htmlReceived on Tue May 30 23:36:51 2006

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