featurePlot: Wrapper for Lattice Plotting of Predictor Variables

In caret: Classification and Regression Training

Description

A shortcut to produce lattice graphs

Usage

featurePlot(x, y, 
            plot = if(is.factor(y)) "strip" else "scatter",
            labels = c("Feature", ""), 
            ...)

Arguments

x	a matrix or data frame of continuous feature/probe/spectra data.
y	a factor indicating class membership.
plot	the type of plot. For classification: box, strip, density, pairs or ellipse. For regression, pairs or scatter
labels	a bad attempt at pre-defined axis labels
...	options passed to lattice calls.

Details

This function “stacks” data to get it into a form compatible with lattice and creates the plots

Value

An object of class “trellis”. The ‘update’ method can be used to update components of the object and the ‘print’ method (usually called by default) will plot it on an appropriate plotting device.

Author(s)

Max Kuhn

Examples

x <- matrix(rnorm(50*5),ncol=5)
y <- factor(rep(c("A", "B"),  25))

trellis.par.set(theme = col.whitebg(), warn = FALSE)
featurePlot(x, y, "ellipse")
featurePlot(x, y, "strip", jitter = TRUE)
featurePlot(x, y, "box")
featurePlot(x, y, "pairs")

Example output

Loading required package: lattice
Loading required package: ggplot2

caret documentation built on May 2, 2019, 5:47 p.m.