Can anyone explain please which degree of freedom is which?

(from http://www.scipy.org/doc/api_docs/Sc...e_multivariate)

f_value_multivariate(ER, EF, dfnum, dfden)

Returns an F-statistic given the following:
ER = error associated with the null hypothesis (the Restricted model)
EF = error associated with the alternate hypothesis (the Full model)
dfR = degrees of freedom the Restricted model
dfF = degrees of freedom associated with the Restricted model
where ER and EF are matrices from a multivariate F calculation.