def plot_interval(self, parameter='t'):
        t = _symbol(parameter)
        return [t, 0, 1]
Returns the kernel smoothing estimate for point x based on x-values
dataset/ETHPy150Open sympy/sympy/sympy/geometry/line3d.py/Segment3D.plot_interval--crossover with--dataset/ETHPy150Open statsmodels/statsmodels/statsmodels/sandbox/nonparametric/kernels.py/CustomKernel.smooth