Plot3 function

Pseudo-3D plotting

Plot3() displays three-dimensional data in two dimensions, reflecting the third dimension with point scaling, overlap and fogging. Points with a lower z value are smaller than, fainter than, and overlapped by points with a higher value.

Plot3(
  x,
  y = NULL,
  z = NULL,
  pch = par("pch"),
  col = par("col"),
  bg = NA,
  cex = 1,
  axes = TRUE,
  frame.plot = axes,
  plot.bg = NA,
  fog = 1/2,
  shrink = 1/2,
  add = FALSE,
  ...
)

Arguments

• x, y, z: Coordinates of points to plot.
• bg, cex, col, pch, add, axes, frame.plot, ...``: Parameters passed to plot.default().
• plot.bg: Colour with which to fill plot area, used as fog colour.
• fog: Numeric from zero (no fading) to one (furthest points are invisible) specifying amount to fade distant points.
• shrink: Numeric specifying degree to which size of plotted point should reflect z position. 0 denotes no scaling; if 1, furthest point will have zero size.

Examples

Plot3(1:10, 1:10, 1:10, cex = 7, pch = 16, axes = FALSE, asp = 1)
# Extreme values of fog and shrink will cause smallest z values to
# become invisible.
Plot3(1:10, 1:10, 1:10, cex = 7, pch = 16, axes = FALSE, asp = 1,
      fog = 1, shrink = 1)

Author(s)

Martin R. Smith

(martin.smith@durham.ac.uk)