[R] Grid building in R

Dylan Beaudette dylan.beaudette at gmail.com
Thu Jul 10 01:19:05 CEST 2008

On Wednesday 09 July 2008, hippie dream wrote:
> This might not possible in R but I thought I would give it shot. I am have
> to set up a 40 x 40 cm grid of 181 points equidistant from each other. Is
> there any way to produce a graph with R that can do this for me? Actual
> sizes are unimportant as long it is to scale. Thanks

how about:

# 40cm spacing
spacings <- 0:13*40

# a square grid with 196 points
# sqrt(181) is not an integer, sorry!
g <- expand.grid(x=spacings, y=spacings)

# check it out
plot(g, pch=3, cex=0.5)

Dylan Beaudette
Soil Resource Laboratory
University of California at Davis

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