SUBSINDEX Overloaded Class Indexing

Section: Object Oriented Programming

Usage

This method is called for classes in the expressions of the form 
  c = subsindex(a)

where a is an object, and c is an index vector. It is also called for 

  c = b(a)

in which case subsindex(a) must return a vector containing integers between 0 and N-1 where N is the number of elements in the vector b.