MATLAB SIMUlink建模与仿真精讲-张德丰pdf+程序.zip

 clear all;
x1=-6:0.3:6;
y1=1./（2+x1.^2）;
x2=-6:10/（11-1）:6;
y2=1./（2+x2.^2）;
x=-6:0.5:6;
y3=interp1（x2y2x‘linear‘）;
y4=interp1（x2y2x‘spline‘）;
y5=interp1（x2y2x‘nearest‘）;
subplot（221）;
plot（x1y1‘m:‘x2y2‘o‘）;title（‘y=1/（2+x^2）‘）;
subplot（222）;
plot（x1y1‘m:‘xy3）;title（‘linear‘）;
subplot（223）;
plot（x1y1‘m:‘xy4）;title（‘spline‘）;
subplot（224）;
plot（x1y1‘m:‘xy5）;title（‘nearest‘）;
axis（[-6 6 -0.5 2]）;