Sha256: b695e68c823391af369fade6c57eea1089919cb5a5050eecd0ff227ef763665a
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Size: 541 Bytes
Versions: 13
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Contents
module Alf
class Aggregator
#
# Defines a `stddev()` aggregation operator.
#
# Example:
#
# # direct ruby usage
# Alf::Aggregator.stddev{ qty }.aggregate(...)
#
# # lispy
# (summarize :supplies, [:sid], :stddev => stddev{ qty })
#
class Stddev < Variance
# Finalizes the computation.
#
# @see Aggregator::InstanceMethods#finalize
def finalize(memo)
Math.sqrt(super(memo))
end
end # class Stddev
end # class Aggregator
end # module Alf
Version data entries
13 entries across 13 versions & 2 rubygems