sigmoidVarKernGradient: Compute gradient of sigmoid kernel with respect to each parameter (used by gptk)
Description
Compute gradient of sigmoid kernel with respect to each parameter (used by gptk)
Usage
sigmoidVarKernGradient(kern, x, x2, covGrad)
Arguments
covGrad
gradient of covariance function
Value
d k(x, x2) / d theta