Runuran.options function

Set or return options for Runuran library

Library Runuran has some parameters which (usually) affect the behavior of its functions. These can be set for the whole session via Runuran.options.

Runuran.options(...)

Arguments

• ...: A list may be given as the only argument, or any number of arguments may be in the name=value form, a character string for the name of a parameter, or no argument at all may be given.

Returns

Runuran.options returns a list with the updated values of the parameters. If the argument list is not empty, the returned list is invisible. If a single character string is given, then the value of the corresponding parameter is returned (or NULL

if the parameter is not used).

Details

The function provides a tool to control the behavior of library Runuran. A list may be given as the only argument, or any number of arguments may be in the name=value form. If no arguments are specified then the function returns the current settings of all parameters. If a single option name is given as character string, then its value is returned (or NULL if it does not exist). Option values may be abbreviated.

Currently used parameters in alphabetical order:

• error.level: verbosity level of error messages and warnings from the underlying UNU.RAN library. It has no effect on messages from the routines in this package. Warnings are useful for analysing possible problems with the selected combinations of distribution and method. However, they can produce quite a lot of output if the conditions of the method is appropriate for a distribution or the distribution has properties like very heavy tails or very high peaks.

   The following levels can be set:
   
   - **`"default"`:**: same as `"warning"`.
   - **`"none"`:**: all error messages and warnings are suppressed.
   - **`"error"`:**: only show error messages.
   - **`"warning"`:**: show error messages and some of the warnings.
   - **`"all"`:**: show all error messages and warnings.
  

Examples

## save current options
oldval <- Runuran.options()

## show current options
Runuran.options("error.level")

## suppress all UNU.RAN error messages and warnings
Runuran.options(error.level="none")

## restore Runuran options
Runuran.options(oldval)

Author(s)

Josef Leydold josef.leydold@wu.ac.at