plres2x: Plot Residuals vs. Two Explanatory Variables

Description Usage Arguments Value Author(s) Examples

Description

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

Usage

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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

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  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.