keyfct.grad.hn {mrds} | R Documentation |
The key function contains one parameter, the scale. Current implementation assumes that scaled dist is x/scale, not x/width
keyfct.grad.hn(distance, key.scale)
distance |
perpendicular distance vector |
key.scale |
vector of scale values |
d key / d scale = exp(-y ^ 2 / (2 scale ^ 2)) * (y ^ 2 / scale ^ 3)
vector of derivatives of the half-normal key function w.r.t. the scale parameter