Polyval gives me a error

Hi,

Can you please tell me what is this error. I am using Matlab R2013 a. I have

      g= fit(z',y,'poly1');

      t1 = polyval(g,0.001).

 when I run this code  in matlab, I get this error

|_**Undefined function 'filter' for input arguments of type 'cfit'.

Error in polyval (line 57) y = filter(1,[1 -x],p);

Error in finite_size_scaling_cchargegap (line 50) t1 = polyval(g,0.001)**_|

Answer 1

[Andrei Bobrov]

t1 = feval(g,0.001)

[Janani Chander]

Thanks , this works.

Answer 2

[David Sanchez]

Try this out:

g= fit(z',y,'poly1');
P=[g.p1 g.p2];
t1 = polyval(P,0.001)