plres2x: Plot Residuals vs. Two Explanatory Variables

In regr0: Building regression models

Description

Plot 2 variables, showing a third one with line symbols. Most suitable for showing residuals of a model as this third variable.

Usage

plres2x(formula = NULL, reg = NULL, data = reg, restricted = NULL,
size = 0, slwd = 1, scol = 2, xlab = NULL, ylab = NULL,
xlim = NULL, ylim = NULL, main = NULL, cex.title = NULL, ...)

Arguments

formula	a formula of the form z~x+y, where x, y are the 2 variables shown by the coordinates of points, and z is shown by line symbols: their orientation corresponds to the sign of z, and their length, to the absolute value.
reg	the result of the model fit
data	the data.frame where the variables are found
restricted	absolute value which truncates the size. Truncation is shown by stars at the end of the line symbols.
size	the symbols are scaled so that size is the length of the largest symbol, as a percentage of the length of the horizontal axis. Defaults to 5/log10(n), where n is the number of observations
slwd	line width of the line symbols
scol	color of the symbols
xlab, ylab	labels for horizontal and vertical axes. Default to the variable names
xlim, ylim	plot ranges for horizontal and vertical axes. They are expanded to accomodate the symbols
main	main title of plot. Defaults to formula
cex.title	character expansion for the main title
...	further arguments, passed to plot

Value

none.

Author(s)

Werner A. Stahel and Andreas Ruckstuhl

Examples

  data(d.blast)
  t.r <- regr(log10(tremor)~location+log10(distance)+log10(charge),
            data=d.blast)
  plres2x(~distance+charge, t.r)

regr0 documentation built on May 2, 2019, 4:52 p.m.