'polyval' warning

[karmalot1122344]

Hi guys,

I've been writing a program to calculate conversion rates, and when I input my data, I receive this warning from the 'polyval' function:

"Warning: Zero degrees of freedom implies infinite error bounds. "

Does anyone know what this means?

Thanks

 

[cibachrome]

The structure you have provided to polyval has no "df" element.

You must make this structure with polyfit. Can't use another fitting routine, your know...