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math.statistics: Add back std as sample-std.

Doug Coleman 2012-11-15 08:27:41 -08:00
parent c0f96f2297
commit cde43eb0be
1 changed files with 2 additions and 0 deletions
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basis/math/statistics/statistics.factor
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@ -272,6 +272,8 @@ PRIVATE>
: sample-std ( seq -- x ) 1 std-ddof ; inline : sample-std ( seq -- x ) 1 std-ddof ; inline
ALIAS: std sample-std
: signal-to-noise ( seq -- x ) [ mean ] [ population-std ] bi / ; : signal-to-noise ( seq -- x ) [ mean ] [ population-std ] bi / ;
: mean-dev ( seq -- x ) dup mean v-n vabs mean ; : mean-dev ( seq -- x ) dup mean v-n vabs mean ;