MASS: plot.lda – R documentation

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MASS

plot.lda

Plot Method for Class 'lda'

Description

Plots a set of data on one, two or more linear discriminants.

Usage

## S3 method for class 'lda'
plot(x, panel = panel.lda, ..., cex = 0.7, dimen,
     abbrev = FALSE, xlab = "LD1", ylab = "LD2")

Arguments

`x`	An object of class `"lda"`.
`panel`	the panel function used to plot the data.
`...`	additional arguments to `pairs`, `ldahist` or `eqscplot`.
`cex`	graphics parameter `cex` for labels on plots.
`dimen`	The number of linear discriminants to be used for the plot; if this exceeds the number determined by `x` the smaller value is used.
`abbrev`	whether the group labels are abbreviated on the plots. If `abbrev > 0` this gives `minlength` in the call to `abbreviate`.
`xlab`	label for the x axis
`ylab`	label for the y axis

Details

This function is a method for the generic function plot() for class "lda". It can be invoked by calling plot(x) for an object x of the appropriate class, or directly by calling plot.lda(x) regardless of the class of the object.

The behaviour is determined by the value of dimen. For dimen > 2, a pairs plot is used. For dimen = 2, an equiscaled scatter plot is drawn. For dimen = 1, a set of histograms or density plots are drawn. Use argument type to match "histogram" or "density" or "both".

References

Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. Fourth edition. Springer.