I am trying to create basic descriptive statistics for a spatial dataset
using moving windows of variable sizes.
I found the filter(dataset, rep(1/a,1)) very useful for obtaining
averages for a given moving window size "a"
(a is the window size within a column of data in a matrix - the filter
is applied to all columns automatically)
I could not find anything analogous for calculating variances over a
moving window. Is there one available?
Otherwise, I'm slowly cranking away on making my own, but it's quite
tedious!
Thank you in advance for any insights!
-Philippe
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