CONSTRUCTORS Class Constructors
Section: Object Oriented Programming
UsageWhen designing a constructor for a FreeMat class, you should design the constructor to take a certain form. The following is the code for the sample
function p = mat(a) if (nargin == 0) p.c = ; p = class(p,'mat'); elseif isa(a,'mat') p = a; else p.c = a; p = class(p,'mat'); end
Generally speaking when it is provided with zero arguments, the constructor returns a default version of the class using a template structure with the right fields populated with default values. If the constructor is given a single argument that matches the class we are trying to construct, the constructor passes through the argument. This form of the constructor is used for type conversion. In particular,
p = mat(a)
p is an array of class
mat. The last form
of the constructor builds a class object given the input. The
meaning of this form depends on what makes sense for your class.
For example, for a polynomial class, you may want to pass in the
coefficients of the polynomial.