Aggregate
A Simple Aggregation Mechanism.
Given an environment and an aggregator (an object of class aggregate simple aggregations are made.
- Keywords
- methods, programming
Usage
Aggregate(x, agg)Arguments
- x
- The data to be aggregated.
- agg
- The aggregator to be used.
Details
Given some data, x the user can accumulate (or aggregate)
information in env using the two supplied functions.
See the accompanying documentation for a more complete example of this
function and its use.
Value
-
No value is returned. This function is evaluated purely for side
effects. The symbols and values in
env are altered.
See Also
Examples
agg1 <- new("aggregator")
Aggregate(letters[1:10], agg1)
# the first 10 letters should be symbols in env1 with values of 1
Aggregate(letters[5:11], agg1)
# now letters[5:10] should have value 2
bb <- mget(letters[1:11], env=aggenv(agg1), ifnotfound=NA)
t1 <- as.numeric(bb); names(t1) <- names(bb)
t1
# a b c d e f g h i j k
# 1 1 1 1 2 2 2 2 2 2 1
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