[R] axis tick colors: only one value allowed?

[Peter Ehlers]

On 2011-12-14 18:32, Carl Witthoft wrote:
> 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.
>

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

>
> <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")