time_fun_s.m

我做了很久的

function y=time_fun_s(t)
syms a a1
T=5;a=T/2;
y1=sym('Heaviside(t+a1)'*(2*t/a1+1))+sym('Heaviside(t-a1)'*(2*t/a1-1))
y=y1-sym('Heaviside(t)'*(4*t/a1))
y=subs(y,a1,a);
y=simple(y);