我自己写的小波变换

				function r=plus(a,b)				%PLUS Addition for Rational Polynomial Objects. (MM)								% D.C. Hanselman, University of Maine, Orono ME 04469				% 3/27/98				% Mastering MATLAB 6, Prentice Hall, ISBN 0-13-019468-9								if isnumeric(a)					rn=mmpadd(a*b.d,b.n);					rd=b.d;					rv=b.v;				elseif isnumeric(b)					rn=mmpadd(b*a.d,a.n);					rd=a.d;					rv=a.v;				else % both polynomial objects					if ~isequal(a.d,b.d)						rn=mmpadd(conv(a.n,b.d),conv(b.n,a.d));						rd=conv(a.d,b.d);					else						rn=mmpadd(a.n,b.n);						rd=b.d;					end					if ~strcmp(a.v,b.v)						warning('Variables Not Identical')					end					rv=a.v;				end				r=mmrp(rn,rd,rv);