screeplot.symcoca function

Screeplot for symmetric co-correspondence analysis

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

## 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

## 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 screeplot of the eignevalues
screeplot(bp.sym)