Calculate the copula of a matrix of variables

Description

Returns the copula of several random variables.

Usage

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copula(x, na.last = NA)
## S3 method for class 'copula'
plot(x, jitter. = FALSE, jitter.factor=1, ...)
## S3 method for class 'copula'
print(x, ...)

Arguments

x

A matrix or data.frame containing numeric variables.

na.last

How to treat missing values. See rank for details.

jitter.

In the call to plot.copula, if jitter=TRUE, the values are jittered before plotting. Defaults to jitter. = FALSE.

jitter.factor

How much jittering to use. Defaults to jitter.factor = 1.

...

Further arguments to be passed to plot method.

Details

The result is obtained by applying edf to each column of x in turn.

Print and plot methods are available for the copula class.

Value

A matrix with the same dimensions as x, each column of which contains the quantiles of each column of x. This object is of class copula.

Author(s)

Harry Southworth

See Also

edf

Examples

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  D <- liver[liver$dose == "D",]
  Dco <- copula(D)
  plot(Dco)

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