nalagr2.m

matlab具有强大的数值计算能力

fplot('1./(x.^2+1)',[-10 10 0 1]);
hold on
x=linspace(-10,10,10);y=1./(x.^2+1);
xx=linspace(-10,10,100);
yy=nalagr(x,y,xx);
plot(xx,yy,'g')
hold on

x=linspace(-10,10,6);y=1./(x.^2+1);
xx=linspace(-10,10,100);
yy=nalagr(x,y,xx);
plot(xx,yy,'r')
hold on

x=linspace(-10,10,15);y=1./(x.^2+1);
xx=linspace(-10,10,100);
yy=nalagr(x,y,xx);
plot(xx,yy,'-b')
hold on

x=linspace(-10,10,11);y=1./(x.^2+1);
xx=linspace(-10,10,100);
yy=nalagr(x,y,xx);
plot(xx,yy,'-y')
hold on