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SUBSREF Array Dereferencing

Section: Array Generation and Manipulations

# Usage

This function can be used to index into basic array types (or structures). It provides a functional interface to execute complex indexing expressions such as `a.b(3){5}` at run time (i.e. while executing a script or a function) without resorting to using `eval`. Note that this function should be overloaded for use with user defined classes, and that it cannot be overloaeded for base types. The basic syntax of the function is:

       b = subsref(a,s)

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 `b = a(5).foo{:}`, the `s` array should contain the following entries

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