close all
echo on
% 正弦函數，余弦函數，指數函數
pause

syms t
y1=cos(t);y2=sin(t);
ezplot(y1,y2)
pause
ezplot(y1,[0,2*pi]),hold on
ezplot(y2,[0,2*pi]),hold off
pause
y3=exp(-t)
ezplot(y3,[0,2*pi])
pause
y4=exp((-0.5+10i)*t)
y41=real(y4)
ezplot(y41,[0,2*pi])
y42=imag(y4)
ezplot(y42,[0,2*pi])
pause
% 階躍函數，門函數
y5=sym('heaviside(t)')
ezplot(y5,[-1,1])
pause
y6=sym('heaviside(t+1)')
ezplot(y6,[-2,2])
pause
y6=sym('heaviside(t-1)-heaviside(t-2)')
ezplot(y6,[0,3])