Screeplot for symmetric co-correspondence analysis

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Description

Produces a screeplot of the eigenvalues of a symmetric co-correspondence analysis.

Usage

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## S3 method for class 'symcoca'
screeplot(x, type = "b",
    xlab = NULL, ylab = NULL,
    ...)

Arguments

x

an object of class "symcoca", the result of a call to symcoca.

type

the type of points to draw; see points.

xlab, ylab

labels for the x and y axes. If none supplied suitable labels are formed from the result object.

...

other graphical parameters as in 'par' may also be passed as arguments.

Author(s)

Gavin L. Simpson.

See Also

coca, screeplot, plot.default

Examples

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## symmetric CoCA
data(beetles)
data(plants)

## log transform the bettle data
beetles <- log(beetles + 1)

## fit the model
bp.sym <- coca(beetles ~ ., data = plants, method = "symmetric")

## draw a biplot of the response
screeplot(bp.sym)

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