The Stock display Method :: Classes and Objects (Programming)

Programming

The Stock display Method

When you issue the statement (without terminating with a semicolon)

```
XYZStock = stock('XYZ',100,25)
```

MATLAB looks for a method in the @stock directory called display. The display method for the stock class produces this output.

Descriptor: XYZ
Date: 17-Nov-1998
Type: stock
Current Value:  2500.00
Number of shares: 100
Share price: 25.00

Here is the stock display method.

function display(s)
% DISPLAY(s) Display a stock object
display(s.asset)
stg = sprintf('Number of shares: %g\nShare price: %3.2f\n',...
    s.numShares,s.sharePrice);
disp(stg)

First, the parent asset object is passed to the asset display method to display its fields (MATLAB calls the asset display method because the input argument is an asset object). The stock object's fields are displayed in a similar way using a formatted text string.

Note that if you did not implement a stock class display method, MATLAB would call the asset display method. This would work, but would display only the descriptor, date, type, and current value.

The Stock subsasgn Method Example -- The Portfolio Container