- #1

kappa

- 7

- 0

I made this function

x =linspace(-1,1,21);

y = (1-6*x^2)^-1;

z=[-1:0.01:1]

c=polyfit(x,y,20)

p=polyval(c,z)

s=spline(x,y,z)

plot(z,(1-6*x^2)^-1, z, p, z, s);

and I receive error at y = (1-6*x^2)^-1;

if I use a function with x only instead of x^2 it works.

How can I fix it?