Runs a basic implementation of the "NW" function with the "K2_Biweight" kernel, just as a proof-of-concept.
pcoriaccel_NW_basic(Xb, Y, xb, y_seq, h)A matrix of the same size as xb by y_seq.
a vector (expected to be about 500 elements)
a vector (same size as Xb)
a vector
a vector
a scalar, the bandwidth of kernel