[R] Mapping in R

[jgarcia at ija.csic.es]

It is relatively easy to do a small function for this in R:
a) select the desired width for your border
b) through a fix number or through the use of pretty(), establish the
number of rectangles you want along your border.
Then e.g., you can use rect() you build the sequence of black-white
rectangles along your border.

Hope this helps.

Javier García-Pintado
...




> Kelsey Scheitlin <kns07g <at> fsu.edu> writes:
>
>>
>> Hi, I am looking for a specific mapping capability in R that I can't
>> seem to
> find, but think exists. I would
>> like to make a border of a map have alternating black and white squares
> instead of the common latitude and
>> longitude grid.  (example:
>> http://www.cccturtle.org/sat_maps/map0bw8.gif). If
> anyone knows if
>> there is or is not a function capable if doing this could you please let
>> me
> know? Thanks!
>>
>> Kelsey
>
>   It's not QUITE what you're looking for, but
>
> plot(0:1,0:1,bty="n",axes=FALSE)
> box(bty="o",lwd=6,lty="FF")
>
> (See ?box, ?par under "bty" and "Line Type Specification")
>
> Otherwise you can do this by using par("usr") to find the
> edges of the map, seq() to construct appropriate x and y
> sequences, and segments() to draw the lines.
>
>   Ben Bolker
>
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