MATLAB: Polyval gives me a error

polyval

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)**_|

Best Answer

t1 = feval(g,0.001)