[R] Reversing axis label order
jim at bitwrit.com.au
Tue May 5 10:52:04 CEST 2009
Steve Murray wrote:
> Dear R Users,
> I am executing the following command to produce a line graph:
> matplot(aggregate_1986[,1], aggregate_1986[,2:3], type="l", col=2:3)
> On the x-axis I have values of Latitude (in column 1) ranging from -60 to +80 (left to right on the x-axis). However, I wish to have these values shown in reverse on the x-axis, going from +80 to -60 (ie. North to South in terms of Latitude). I have tried doing this by altering the command as follows:
> matplot(-aggregate_1986[,1], aggregate_1986[,2:3], type="l", col=2:3)
> ...but this produces the inverse sign of the latitude values along the axis - ie. it goes from -80 to +60.
> How do I reverse the display of the axis labels correctly and of course, maintain the associated data values correctly?
Have a look at rev.axis in the plotrix package.
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