MATLAB Object-Oriented Programming

Example Code Discussion

function obj = DocPolynom(c)
if nargin > 0
if isa(c,'DocPolynom')
obj.coef = c.coef;
else
obj.coef = c(:).';
end
end
end

Class constructor creates objects

using:

• Coefficient vector of existing
  object


• Coefficient vector passed as
  argument

See “The DocPolynom

Constructor” on page 19-13

function obj = set.coef(obj,val)
if ~isa(val,'double')
error('Coefficients must be doubles')
end
ind = find(val(:).'~=0);
if ~isempty(ind);
obj.coef = val(ind(1):end);
else
obj.coef = val;
end
end

Set method for coef property:

• Allows coefficients only of
  type double


• Removes leading zeros from
  the coefficient vector.

See “Remove Irrelevant

Coefficients” on page 19-14

function c = double(obj)
c = obj.coef;
end

Convert DocPolynom object to

double by returning the

coefficients.

See “Convert DocPolynom

Objects to Other Types” on page

19-15

Representing Polynomials with Classes