# [R] Multiple planes in a scatterplot3d

Uwe Ligges ligges at statistik.tu-dortmund.de
Sun Feb 19 16:54:57 CET 2012

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On 18.02.2012 06:42, kpiratla wrote:
> I am relatively new to R and scatterplot3d function. I need to draw a 3d
> scatterplot and then add three different planes (each parallel to xy, yz and
> zx with varying intercepts) to a 3d scatterplot. I got the plot running and
> i was also able to produce one plane parallel to xy surface by using the
> function "spd\$plane3d(0.3549896,0,0,lty="dotted")". I do not understand how
> i can add other two planes that are parallel to yz and zx. It would be great
> if someone can help me with this.

The "\$plane3d" function returned by scatterplot3d() is intended for
planes that describe z by x and y, hence the other two planes you aim at
are not directly poossible, but can easily be coded as follows:

library("scatterplot3d")
spd <- scatterplot3d(1:10, 1:10, 1:10)

# xy
spd\$plane3d(0.3549896,0,0,lty="dotted")

# yz
x0 <- 5
xyz1 <- spd\$xyz.convert(rep(x0, 6), rep(0, 6), seq(0, 10, by=2))
xyz2 <- spd\$xyz.convert(rep(x0, 6), rep(10, 6), seq(0, 10, by=2))
segments(xyz1\$x, xyz1\$y, xyz2\$x, xyz2\$y, lty="dotted")

xyz1 <- spd\$xyz.convert(rep(x0, 6), seq(0, 10, by=2), rep(0, 6))
xyz2 <- spd\$xyz.convert(rep(x0, 6), seq(0, 10, by=2), rep(10, 6))
segments(xyz1\$x, xyz1\$y, xyz2\$x, xyz2\$y, lty="dotted")

# zx
y0 <- 6
xyz1 <- spd\$xyz.convert(rep(0, 6), rep(y0, 6), seq(0, 10, by=2))
xyz2 <- spd\$xyz.convert(rep(10, 6), rep(y0, 6), seq(0, 10, by=2))
segments(xyz1\$x, xyz1\$y, xyz2\$x, xyz2\$y, lty="dotted")

xyz1 <- spd\$xyz.convert(seq(0, 10, by=2), rep(y0, 6), rep(0, 6))
xyz2 <- spd\$xyz.convert(seq(0, 10, by=2), rep(y0, 6), rep(10, 6))
segments(xyz1\$x, xyz1\$y, xyz2\$x, xyz2\$y, lty="dotted")

Best,
Uwe Ligges

>
> Thanks
> Kalyan http://r.789695.n4.nabble.com/file/n4399234/Latest.pdf Latest.pdf
>
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