[R] plotting a grid with color on a map

dxc13 dxc13 at health.state.ny.us
Wed May 13 14:55:48 CEST 2009


Thanks, Jim.  This seems to be what I am looking for.  Just have to fine tune
the colors to get some distinctive greens, blues, yellows and oranges in
there and I should be good to go.


Jim Lemon-2 wrote:
> 
> It was the NAs that fooled color2D.matplot. This gets your colors, 
> although not exactly what you want. Look at the help for color2D.matplot 
> to get that. I think fiddling with the x and y limits on the map() call 
> will get the positions right.
> 
> temp1<-read.table("time1test.dat",header=TRUE)
> library(plotrix)
> # reverse the row order, as color2D.matplot reverses it
> color2D.matplot(temp1[36:1,],c(0.5,1),c(0.5,0),c(1,0),axes=FALSE)
> # don't erase the above plot
> par(new=TRUE)
> # do a "ghost" plot with just the axes
> plot(0,xlim=maplim[1:2],ylim=maplim[3:4],type="n")
> # add the map on top in black
> map(add=TRUE,col="black")
> 
> Jim
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
> 
> 

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