function A = myline(x,y)% myline.m Constructor method for myline class. Called as%%          A = myline(x,y)%% INPUT PARAMETERS%         x : x values or a (slope)%         y : y values or b (intercept)if nargin == 0; x = 0; y = 0; end % default valuesif prod(size(x)) == 1    A.a = x; A.b = y;else     B(:,1) = x(:); B(:,2) = 1;% Note how the line is computed by least squares, equivalent% to coeff = (B'*B) \ (B'*y)    coeff = B\y(:);    A.a = coeff(1); A.b = coeff(2);endA = class(A,'myline');