klaR (version 0.3-4)

plineplot: Plotting marginal posterior class probabilities

Description

For a given variable the posteriori probabilities of the classes given by a classification method are plotted. The variable need not be used for the actual classifcation.

Usage

plineplot(formula, data, method, x, col.wrong = "red", ylim = c(0, 1), loo=FALSE, ...)

Arguments

formula

formula of the form groups ~ x1 + x2 + .... That is, the response is the grouping factor and the right hand side specifies the (non-factor) discriminators.

data

Data frame from which variables specified in formula are preferentially to be taken.

method

character, name of classification function (e.g. lda).

x

variable that should be plotted. See examples.

col.wrong

color to use for missclassified objects.

ylim

ylim for the plot.

loo

Should leave-one-out estimate be used for prediction?

...

further arguments passed to the underlying classification method or plot functions.

Value

• The actual error rate.

See Also

partimat

Examples

library(MASS)

# The name of the variable can be used for x
data(B3)
plineplot(PHASEN ~ ., data = B3, method = "lda", 
    x = "EWAJW", xlab = "EWAJW")

# The plotted variable need not be in the data
data(iris)
iris2 <- iris[ , c(1,3,5)]
plineplot(Species ~ ., data = iris2, method = "lda", 
    x = iris[ , 4], xlab = "Petal.Width")