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makeyourfilter
2004 Feb 25
2
circular filter
I try to find a circular filter that I can export to be used in a
spatial software.
Assuming, we have a matrix, representing 9x9 regularly spaced points
with the center point 'filter[5, 5]'. In this example, I want to find a
function that weighs all neighbor points within a distance of d=4 units
with 1:
> filter <- matrix(0, 9, 9)
> filter <- function() ...
> filter