On Jan 7, 2010, at 10:42 AM, dbeest wrote:
I’ve been busy making some histograms and I would like to distinguish
different groups. I’ve been doing it like this:
a <- c(1,1,1,1,2,2,2)
hist(a,breaks=c(0,1,2))
hist(a[3:5],breaks=c(0,1,2),col="red",add=TRUE)
Basically plotting them over each other, I assume there is a better
way…Anyway what I want to do is make them in grayscale which
essentially
means giving different groups patterns. I’ve been playing around with
“density” and “angle”
a <- c(1,1,1,1,2,2,2)
hist(a,breaks=c(0,1,2))
hist(a[3:5],breaks=c(0,1,2),add=TRUE,,density=3,angle=9)
Although you can make many different combinations with these I
wondered if
there are “patterns” (dots for example) available in the similar
fashion as
the colors (col="red" or pattern="dots")
I have not been able t find such. But you can also get the shading
lines to respond to lty and to a very limited extent to lwd, ... at
least I was not able to get arbitrarily thick lines on my screen
graphics device (Quartz). The help pages I looked at suggested that
different graphics devices might have varying parameters that could be
fiddled with.
--
David Winsemius, MD
Heritage Laboratories
West Hartford, CT
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