sigmult.m

matlab的一些基础程序

function [y,n]=sigmult(x1,n1,x2,n2)
%implements y(n)=x1(n)+x2(n)
%------------------------------------------
%[y,n]=sigadd(x1,n1,x2,n2)
n=min(min(n1),min(n2)):max(max(n1),max(n2));
y1=zeros(1,length(n));
y2=y1;
y1(find((n>=min(n1))&(n<=max(n1))==1))=x1;
y2(find((n>=min(n2))&(n<=max(n2))==1))=x2;

 y=y1.*y2;