MATLAB Object-Oriented Programming

(1/AstroConstants.Re - 0.5 * r);

end

Constant Property Assigned a Handle Object

If a class defines a constant property with a value that is a handle object, you can assign

values to the handle object properties. Create a local variable to access the handle object.

For example, the ConstMapClass class defines a constant property. The value of the

constant property is a handle object (a containers.Map object).

classdef ConstMapClass < handle

properties (Constant)

ConstMapProp = containers.Map

end

end

To assign the current date to the Date key, return the handle from the constant property,

then make the assignment using the local variable on the left side of the assignment

statement:

localMap = ConstMapClass.ConstMapProp

localMap('Date') = datestr(clock);

You cannot use a reference to a constant property on the left side of an assignment

statement. For example, MATLAB interprets the following statement as the creation of a

struct named ConstantMapClass with a field ConstMapProp:

ConstMapClass.ConstMapProp('Date') = datestr(clock);

Constant Property Assigned Any Object

You can assign an instance of the defining class to a constant property. MATLAB creates

the instance assigned to the constant property when loading the class. Use this technique

only when the defining class is a handle class.

The MyProject is an example of such a class:

classdef MyProject < handle

properties (Constant)

ProjectInfo = MyProject

end

15 Constant Properties