moving window rms slope

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petahadron 2016-6-5

编辑： petahadron 2016-6-5

I am trying to calculate the rms slope of a moving window:

zc = elevation of central cell

zb = elevation of cells along the border of the window size

sb = distance of central cell to a border cell

N is the width of window size

To add, I am looking at a 2D matrix

I am having trouble computing the slope.. I have thought of using convolution and diff functions, but they lead to nowhere.

Please advice.

Thanks in advanced!

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