[KFUNC, NFUNC] = KERNEL_FUNCTION(KERNEL, NORMALIZE) returns the kernel KFUNC and normalization function NFUNC for two string inputs.
- Possible values for normalize
{'none', 'l1', 'l2', 'linf'}
- Possible values for kernel
{'l1', 'chi2', 'hell', 'dl2', 'dl1', 'dchi2', 'dhell'}