lut.m

我做了很久的

x1=-0.2:0.03:0.2
y1=-0.2:0.03:0.2
[x,y]=meshgrid(x1,y1)
s=x+i*y
fs=abs(1./s)
mesh(x,y,fs)
surf(x,y,fs)
title('单位阶跃信号的拉氏变换曲面图')
axis([-0.2,0.2,-0.2,0.2,0,60])
rotate3d%实现3D效果