Dear all,
I have a grid (data frame) dataset at 0.5 x 0.5 degrees spatial resolution (720
columns x 360 rows; regular spacing) and wish to coarsen this to a resolution
of 2.5 x 2.5 degrees. A simple calculation which takes the mean of a block of
points to form the regridded values would do the trick. Values which should be
excluded from the calculation are -9999 (unless all points within a block are
-9999, in which case -9999 should be returned as the 'new' cell).
How would I go about achieving this in R?
Any help or guidelines would be very much appreciated.
Many thanks,
Steve
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