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axis tick colors: only one value allowed?

2 messages · Carl Witthoft, Peter Ehlers

Carl Witthoft
# 
That only puts different colors on different axes.  I was wondering 
about the (silly) possibility of having a range of colors for the ticks 
on a given axis.


<quote>
From: Hans W Borchers <hwborchers_at_googlemail.com>
Date: Tue, 13 Dec 2011 14:21:31 +0000
Carl Witthoft <carl <at> witthoft.com> writes:

 >
 > Hi,
 > So far as I can tell, the 'col.ticks' parameter for axis() only uses the
 > first value provided. E.g.:
 >
 > plot(0:1,0:1, col.ticks=c('blue','red','green')) #all ticks are blue
 >
 > Just wondering if there's a different option in the basic plot commands
 > that can handle multiple colors, and also whether ggplot and/or lattice
 > allow for multiple tick colors.
See `?axis' or try this:

     plot(0:1,0:1, type = "n", axes = FALSE)     box()
     axis(side=1, lwd.ticks = 2, col.ticks="blue")     axis(side=2, 
lwd.ticks = 2, col.ticks="red")
Peter Ehlers
#
On 2011-12-14 18:32, Carl Witthoft wrote:
I think you would have to either hack the code or issue
several axis() calls, e.g.

   plot(1:9, 1:9, axes=FALSE, frame=TRUE)
   axis(1, at=c(1,4,7), col.ticks=2, lwd.ticks=2)
   axis(1, at=c(2,5,8), col.ticks=3, lwd.ticks=2)
   axis(1, at=c(3,6,9), col.ticks=4, lwd.ticks=2)

Add col.axis=yourColourChoice arguments if you also want
coloured labels.

Peter Ehlers