[求助]请帮帮小弟订正这题的matlab程序

[chenyo]

各位前辈，请帮帮小弟订正这题的matlab程序

谢谢........

Please polt the function of g(t) and Amp[G(f)] by using the software which you are familiar with.

g(t) = exp(-2t)u(t)

G(f)=1/(2+j2*pi*f)


matlab code:

echo on
delta=0.01;
F_min=-2;
F_max=2;
t=F_min:delta:F_max;
g=exp(-2t)u(t);
G=1./(2+j2*pi*f);

上面是错误，但不知道要如何写起，请帮帮小弟，谢谢........