graphdot.microkernel.kronecker_delta module

graphdot.microkernel.kronecker_delta.KroneckerDelta(h, h_bounds=(0.001, 1))

Creates a Kronecker delta microkernel that returns either 1 or h depending on whether two features compare equal, i.e. \(k_\delta(i, j) = \begin{cases} 1, i = j \\ h, otherwise \end{cases}\).

Parameters:

• h (float in (0, 1)) – The value of the microkernel when two features do not compare equal.
• h_bounds (tuple or "fixed") – If tuple, contains the lower and upper bounds that h is allowed to vary during hyperparameter optimization. If “fixed”, the hyperparameter will not be optimized during training.