R: Check Parameters of the Variance Gamma Distribution
vgCheckPars
R Documentation
Check Parameters of the Variance Gamma Distribution
Description
Given a putative set of parameters for the variance gamma
distribution, the functions checks if the parameters are in the
correct range, and if the set has the correct length of 4.
Usage
vgCheckPars(param, ...)
Arguments
param
Numeric. Putative parameter values for a Variance Gamma
distribution.
...
Further arguments for calls to all.equal.
Details
The vector param takes the form c(c, sigma, theta, nu).
If either sigma or nu is negative, then an error message
is returned.
If the vector param has a length not equal to 4, then an error
message is returned.
Value
A list with components:
case
Whichever of 'error' or 'normal' is
identified by the function.
errMessage
An appropriate error message if an error was found,
the empty string "" otherwise.