[GRASS-user] The r.neighbors algorithm

[Qinglin Li]

Hello, everyone:

I want to know the algorithm how to calculate r.neighbors (variance), I
assuming it is the standard variance in the windows for replacing the focal
value:

X^2 = sum(xi - xbar)^2 (I = 1, . 9 (3x3), or 25 (5x5), or 49 (7x7), or 81
(9x9), or 121(11x11), or etc).

 

Thanks for your further explanations

 

Qinglin

 

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