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