fields: supportsArg – R documentation

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supportsArg

Tests if function supports a given argument

Description

Tests if the given function supports the given argument. Commonly used in fields code for determining if a covariance function supports precomputation of the distance matrix and evaluation of the covariance matrix over only the upper triangle.

Usage

supportsArg(fun=stationary.cov, arg)

Arguments

`fun`	The function tested for support for whether it supports the argument `arg` as input
`arg`	The argument to check if `fun` supports using as input

Details

Currently only stationary.cov and Exp.cov support evaluation of the covariance matrix over the upper triangle (and diagonal) only via the onlyUpper argument and distance matrix precomputation via the distMat argument.

Value

A logical indicating whether the given function supports use of the given argument

Author(s)

John Paige

Examples

################
#Test covariance function to see if it supports evaluation of 
#covariance matrix over upper triangle only
################

supportsArg(Rad.cov, "distMat")
supportsArg(Rad.cov, "onlyUpper")
supportsArg(stationary.cov, "distMat")
supportsArg(stationary.cov, "onlyUpper")
supportsArg(Exp.cov, "distMat")
supportsArg(Exp.cov, "onlyUpper")

fields

Tools for Spatial Data

v11.6

GPL (>= 2)

Authors

Douglas Nychka [aut, cre], Reinhard Furrer [aut], John Paige [aut], Stephan Sain [aut], Florian Gerber [aut], Matthew Iverson [aut], University Corporation for Atmospheric Research [cph]

Initial release

2020-10-06