panel.car {car} | R Documentation

## Panel Function for Coplots

### Description

a panel function for use with `coplot` that plots points, a lowess line, and a regression line.

### Usage

    panel.car(x, y, col, pch, cex=1, span=0.5, lwd=2,
      reg.line=lm, lowess.line=TRUE, ...)

### Arguments

`x` | vector giving horizontal coordinates.
`y` | vector giving vertical coordinates.
`col` | point color.
`pch` | plotting character for points.
`cex` | character expansion factor for points.
`span` | span for lowess smoother.
`lwd` | line width, default is `2`.
`reg.line` | function to compute coefficients of regression line, or `FALSE` for no line.
`lowess.line` | if `TRUE` plot lowess smooth.
`...` | other arguments to pass to functions `lines` and `regLine`.

### Value

`NULL`. This function is used for its side effect: producing a panel in a coplot.

### Author(s)

John Fox jfox@mcmaster.ca

### See Also

`coplot`, `regLine`

### Examples

    coplot(prestige ~ income|education, panel=panel.car,
      col="red", data=Prestige)

[Package car version 2.1-6 Index]