Create kernel functions based on configuration
create_kernel_functions(
kernel.fun = "Schennach2004",
if_approx_kernel = TRUE,
kernel.resol = 1000
)A list containing kernel function, its Fourier transform, and the kernel type
A string specifying the kernel function to be used.
Logical. If TRUE, uses approximations for the kernel function.
The resolution for kernel function approximation.