R.methodsS3 (version 1.1.0)

throw: Throws an exception

Description

Throws an exception by calling stop(). Note that throw() can be defined for specific classes, which can then be caught (or not) using tryCatch(). This default function will be overridden by ditto in the R.oo package, if that is loaded. The latter throw implementation is fully backward compatible with this one, but the error object thrown is of class Exception.

Usage

## S3 method for class 'default':
throw(...)

Arguments

...

One or several strings that are concatenated and collapsed into on message string.

Value

• Returns nothing.

Examples

rbern <- function(n=1, prob=1/2) {
    if (prob < 0 || prob > 1)
      throw("Argument 'prob' is out of range: ", prob)
    rbinom(n=n, size=1, prob=prob)
  }

  rbern(10, 0.4)
  # [1] 0 1 0 0 0 1 0 0 1 0
  tryCatch(rbern(10, 10*0.4),
    error=function(ex) {}
  )