subsetting

Suppose I have some MathType that looks like:

((x1, x2, ... xn) -> (y1, y2, ... yn))

How should I create a subset of this data where one of the x's or y's
falls within some range?


For instance, I might have a data set like:

((lat, lon) -> (elevation, temperature, precipitation, NDVI))

and I might want to bin this data by elevation in order to demonstrate
something about microclimates on a mountainside.


-- 
John Brecht
SRI International
Center for Technology in Learning
333 Ravenswood Avenue
Menlo Park, CA  94025
650-859-2325 (voice)
650-859-3673 (fax)
john.brecht@xxxxxxx

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