Sha256: 1f3c4d8d0a3c1e009ce4a995f2b650761fd3b17c75c12ad962f0df80cd9da692
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Size: 446 Bytes
Versions: 6
Compression:
Stored size: 446 Bytes
Contents
# Variance
Variance
## Signature
variance(expr: AttrName|(Tuple->Numeric)) -> Aggregator
## Examples
variance(:qty)
variance{|t| t.qty * t.price }
variance(->(t){ t.qty * t.price })
## Description
Computes how far the set of input values is spread out.
## 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