This is part of the refdist module

Use a switching function to determine how many of the input variables are less than a certain cutoff.

TYPE	( default=gaussian ) the type of kernel to use
CENTER	the position of the center of the kernel
COVAR	the covariance of the kernel
WEIGHT	( default=1.0 ) the weight to multiply this kernel function by
NUMBER	( default=1 ) if there are multiple sets of kernel parameters in the input file which set of kernel parameters would you like to read in here

NORMALIZED	( default=off ) would you like the kernel function to be normalized
ARG	the arguments that should be used as input to this method. You can use multiple instances of this keyword i.e. ARG1, ARG2, ARG3...
SIGMA	square root of variance of the cluster
REFERENCE	the file from which to read the kernel parameters