select.range accepts two vectors of paired observations and
returns a vector of observations from
data. The observations
returned are those for which the paired values in
within the range specified by
NOTE: The in-range condition is greater than or equal to
and less than
max. This allows contiguous ranges to be
specified without returning the same value in two sets.
A vector of observations to be used for grouping.
The minimum value of the range.
The maximum value of the range.
A numeric vector of observations.
The subset of observations from
data is returned invisibly.
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