def fit(self, a, D, sigma):

        self._compute_S(D, sigma)    #random effect plus error covariance
        self._compute_W()            #inv(S)
        self._compute_r(a)           #residual after removing fixed effects/exogs
        self._compute_b(D)           #?  coefficients on random exog, Z ?
Show the string representation of *value* in a dialog box.
dataset/ETHPy150Open statsmodels/statsmodels/statsmodels/sandbox/panel/mixed.py/Unit.fit--crossover with--dataset/ETHPy150Open Esri/solutions-geoprocessing-toolbox/suitability/toolboxes/scripts/MultidimensionSupplementalTools/MultidimensionSupplementalTools/Scripts/mds/tools/tool.py/Tool.debug