Kernel functions for creating kernel based weights with st_kernel_weights()
Details
Supported kernels are below.
Formulas come from Anselin & Morrison's notes.
uniform
: K(z) = 1/2 for |z|<1triangular
: K(z) = (1-|z|) for |z| < 1epanechnikov
: K(z) = (3/4)(1-z^2) for |z| < 1quartic
: K(z) = (15/16)*(1-(z/threshold)^2^)2 for |z| < 1guassian
: K(z) = (2pi)^1/2 * exp(-z^2/2)