@Cache_this(limit=3, ignore_args=())
    def K(self, X, X2=None):
        r = self._scaled_dist(X, X2)
        return self.K_of_r(r)
Kernel function applied on inputs X and X2.
dataset/ETHPy150Open SheffieldML/GPy/GPy/kern/src/stationary.py/Stationary.K