kern {coloredICA}  R Documentation 
This function returns a vector of length n
with the evaluation of an exponential Kernel at a point x0
\in R^2
for the n
Fourier frequencies.
kern(x0, h, freq)
x0 
Point 
h 
Kernel bandwidth. 
freq 

This function returns a vector of length n
with the evaluation of an exponential Kernel at a point x0
\in R^2
for the n
Fourier frequencies. In particular the k
th vector element is
e^{\frac{(\boldsymbol{\omega}_k  x_0)^T(\boldsymbol{\omega}_k  x_0)}{h^2}}.
It returns a list containing the following component:
v 
vector containing the 
It is auxiliary for locmulti
, grad
and hess
functions.
Lee, S., Shen, H., Truong, Y. and Zanini, P.