Programming and Data Types

The Asset subsref Method

The subsref method provides access to the data contained in an asset object using one-based numeric indexing and structure field name indexing. The outer switch statement determines if the index is a numeric or field name syntax. The inner switch statements map the index to the appropriate value.

MATLAB calls subsref whenever you make a subscripted reference to an object (e.g., A(i), A{i}, or A.fieldname).

• function b = subsref(a,index)
  %SUBSREF Define field name indexing for asset objects
  switch index.type
  case '()'
      switch index.subs{:}
      case 1
          b = a.descriptor;
      case 2
          b = a.date;
      case 3
          b = a.current_value;
      otherwise
          error('Index out of range')
      end
  case '.'
      switch index.subs
      case 'descriptor'
          b = a.descriptor;
      case 'date'
          b = a.date;
      case 'current_value'
          b = a.current_value;
      otherwise
          error('Invalid field name')
      end
  case '{}'
      error('Cell array indexing not supported by asset objects')
  end
  

See the The Stock subsref Method for an example of how the child subsref method calls the parent subsref method.

The Asset set Method

The Asset subsasgn Method