Sha256: 2d6c636a7adfdec96503df1a3d33e323bce0800a93100d9c6ca1cc1010e42ff7
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Size: 443 Bytes
Versions: 6
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Stored size: 443 Bytes
Contents
# Stddev
Standard deviation
## Signature
stddev(expr: AttrName|(Tuple->Numeric)) -> Aggregator
## Examples
stddev(:qty)
stddev{|t| t.qty * t.price }
stddev(->(t){ t.qty * t.price })
## Description
Computes how much variation from the average exists.
## Implementation notes
This aggregate function should only be used with numeric types. As of
current Alf version, it does not aggregate empty sets correctly on
non-numeric data types.
Version data entries
6 entries across 6 versions & 1 rubygems