ScalarObject-class          package:Biobase          R Documentation

Utility classes for length one (scalar) objects

Description:

     These classes represent scalar quantities, such as a string or a
     number and are useful because they provide their own validity
     checking.  The classes 'ScalarCharacter', 'ScalarLogical', 
     'ScalarInteger', and 'ScalarNumeric' all extend their respective
     base vector types and can be used interchangeably (except they
     should always have length one).

     The 'mkScalar' factory function provides a convenient way of
     creating 'Scalar<type>' objects (see the examples section below).

Usage:

     mkScalar(obj)

Arguments:

     obj: An object of type 'character', 'logical', 'integer', or
          'double'

Author(s):

     Seth Falcon

Examples:

     v <- list(mkScalar("a single string"),
               mkScalar(1),
               mkScalar(1L),
               mkScalar(TRUE))
     sapply(v, class)
     sapply(v, length)

