def fit_lsq(self, df):
tdf = df.set_index('<STR_LIT>')<EOL>return tdf.ix['<STR_LIT>']['<STR_LIT>'], tdf.ix['<STR_LIT>']['<STR_LIT>']<EOL>
Parameterize generic SAR curve from empirical data set

Parameters
----------
df : DataFrame
    Result data frame from empirical SAR analysis

Notes
-----
Simply returns S0 and N0 from empirical SAR output, which are two fixed
parameters of METE SAR and EAR. This simply returns n_spp and
n_individs from the 1,1 division in
the dataframe. An error will be thrown if this division is not present
The ``fit_lsq`` is retained for consistency with other curves.