def __call__(self, x):
        return self._shape(x)
interpolates p based on the values in the A table for the
dataset/ETHPy150Open statsmodels/statsmodels/statsmodels/sandbox/nonparametric/kernels.py/CustomKernel.__call__--crossover with--dataset/ETHPy150Open statsmodels/statsmodels/statsmodels/stats/libqsturng/qsturng_.py/_interpolate_p