[R] 2d color coded line plot

Jim Lemon jim at bitwrit.com.au
Fri Aug 21 13:53:11 CEST 2009

Gonçalo Graça wrote:
> Hi! I'm not experienced very experienced with R and i'm looking for a 
> way doing plots like in this example 
> http://www.mathworks.de/matlabcentral/fx_files/23566/2/color_line3.png, 
> which basically it is a 2d plot in which the 3rd dimension (variable) 
> is color coded. I have only seen elsewhere that it is possible to 
> color code dots in a scatter plot and I tried it with success although 
> I  I didn't find a way of including the color bar has legend to the plot.
> I wonder if any one can give me some hint on this.
Hi Goncalo,
Have a look at the color.scale.line, color.scale and smoothColor 
functions in the plotrix package. See color.legend for the "color bar".


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