validMsg               package:Biobase               R Documentation

Conditionally append result to validity message

Description:

     This function facilitates constructing messages during S4 class
     validation, and is meant for developer rather than end-user use.

Usage:

     validMsg(msg, result)

Arguments:

     msg: A character vector or NULL.

  result: Any vector.

Details:

     This function appends 'result' to 'msg', but only if 'result' is a
     character vector.

Author(s):

     Martin Morgan <mtmorgan@fhcrc.org>

Examples:

     msg <- NULL
     validMsg(msg, FALSE) # still NULL
     msg <- validMsg(msg, "one")
     validMsg(msg, "two")

