colplot function

Scatter plot, with variable-based point colours

colplot(
  x,
  y,
  z,
  n = 20,
  z.lim = NULL,
  breaks = NULL,
  palette = heat.colors,
  rev = TRUE,
  pch = 21,
  add = FALSE,
  ...,
  legend = FALSE,
  n.legend = 6,
  legend.pretty = TRUE,
  legend.plot = TRUE,
  legend.x,
  legend.y = NULL,
  legend.horiz = FALSE,
  legend.bg = par("bg")
)

Arguments

• x: a vector of x coordinates
• y: a vector of y coordinates
• z: a variable for defining colours
• n: an integer giving the number of colour levels, supplied to pretty
• z.lim: xxx
• breaks: a vector or breaks for defining color intervals; defaults to NULL, so pretty and n are used on z
• palette: a function for the color palette, or colors between breaks; defaults to heat.colors
• rev: logical: should the palette be reversed? Defaults to TRUE
• pch: an integer giving the plotting character, supplied to plot
• add: should this be added to an existing plot? Defaults to FALSE
• ...: other arguments passed to plot
• legend: should a legend be added? Defaults to codeFALSE
• n.legend: an integer giving the approximate number of legend entries; defaults to 6
• legend.pretty: logical: should the legend values produced by [base]pretty? Othewrwise they are exact. Defaults to TRUE
• legend.plot: passed to legend 's plot argument
• legend.x: passed to legend 's x argument
• legend.y: passed to legend 's y argument
• legend.horiz: passed to legend 's horiz argument
• legend.bg: passed to legend 's bg argument

Returns

A plot

Examples

x <- runif(50)
y <- runif(50)
colplot(x, y, x * y)
colplot(x, y, x * y, legend=TRUE, legend.x="bottomleft")
colplot(x, y, x * y, legend=TRUE, legend.pretty=FALSE, n.legend=10, 
  legend.x="bottomleft", legend.horiz=TRUE)