I'm having difficulty getting plot to work with type="n", when either the x or y variables is a factor.
For example,
x <- 1:10 y <- 1:10
plot(x, as.factor(y), type="n") plot(as.factor(x),y, type="n") plot(y ~ as.factor(x), type="n")
produce plots with data plotted, whereas
plot(x,y, type="n") plot(y ~ x, type = "n")
produce the expected dataless plots
I am running R1.8.1 on Windows (xp), with the windows graphics device.
I have a friend who has tried this on a Mac (OS 10.3.3. with quartz() and x11() devices) and gets erratic behavior, i.e. sometimes plots works as expected, and sometimes not.
Does anyone have any clues on this?
Yes: If x is a factor, boxplot() is called by plot.factor(), the corresponding method for the generic plot().
boxplot() does not care about type="n".
Uwe Ligges
Thanks in advance,
Aries Arditi, Ph.D. Senior Fellow in Vision Science Arlene R. Gordon Research Institute Lighthouse International 111 East 59th Street New York, NY 10022
Tel: +1 212 821 9500 (direct) Fax: +1 212 751 9667 http://www.lighthouse.org/research_staff_arditi.htm
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