SUBSASGN SUBSASGN Overloaded Class Assignment

Usage

This method is called for expressions of the form

  a(b) = c, a{b} = c, a.b = c

and overloading the subsasgn method can allow you
to define the meaning of these expressions for
objects of class a.  These expressions are mapped
to a call of the form

  a = subsasgn(a,s,b)

where s is a structure array with two fields.  The
first field is
  -  type  is a string containing either '()' or
 '{}' or '.' depending on the form of the call.

  -  subs is a cell array or string containing the
 the subscript information.

When multiple indexing experssions are combined together
such as a(5).foo{:} = b, the s array contains
the following entries

  s(1).type = '()'  s(1).subs = {5}
  s(2).type = '.'   s(2).subs = 'foo'
  s(3).type = '{}'  s(3).subs = ':'

