exm05034_3.m

这是学习matlab的资料

syms tao;t=sym('t','positive');					%把t定义为限定性符号变量
ut=sym('Heaviside(t)-Heaviside(t-1)');ht=t*exp(-t);
yt=int(subs(ut,t,tao)*subs(ht,t,t-tao),tao,0,t);
yt=collect(yt,'Heaviside(t-1)')