On Tue, 30 May 2006, Robert Lundqvist wrote: > 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...
Well, they end up where you request them. In that particular case I would use axis() to add a label that matched the tick marks, but mtext() is often useful. > 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... There is the little matter of having access to the S source code and permission to make use of it, as well as knowing how the S graphics device model works (which AFAIK has never been publicly documented but it believed to be somewhat different from R). The devil is in the details: notice how the y axis on the plot shown is uneven, with a stretch in the middle? Should such things be allowed (I think not)? -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ 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.html