nalagr1.m

matlab具有强大的数值计算能力

fplot('1./(x.^2+1)',[-5 5 0 1]);
hold on
x=linspace(-5,5,10);y=1./(x.^2+1);
xx=linspace(-5,5,100);
yy=nalagr(x,y,xx);
plot(xx,yy,'g')
hold on

x=linspace(-5,5,6);y=1./(x.^2+1);
xx=linspace(-5,5,100);
yy=nalagr(x,y,xx);
plot(xx,yy,'r')
hold on

x=linspace(-5,5,15);y=1./(x.^2+1);
xx=linspace(-5,5,100);
yy=nalagr(x,y,xx);
plot(xx,yy,'-r')