精通Matlab综合辅导与指南 用于数学建模的教科书

				function p=mmpadd(a,b)				%MMPADD Polynomial Addition.				% MMPADD(A,B) adds the polynomials A and B.								% D.C. Hanselman, University of Maine, Orono ME 04469				% 3/4/95				% Copyright (c) 1996 by Prentice Hall, Inc.								if nargin					error('Not enough input arguments')				end				a=a(:).';		% make sure inputs are polynomial row vectors				b=b(:).';				na=length(a);	% find lengths of a and b				nb=length(b);				p=[zeros(1,nb-na) a]+[zeros(1,na-nb) b];  % pad with zeros as necessary