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

diff --git a/basis/math/statistics/statistics.factor b/basis/math/statistics/statistics.factor
index bcaacbb82ef315b77adae2a55e64392741abb7c3..80ce8a99aaa30e024501cb1b561a300adbce70d9 100644 (file)
--- a/basis/math/statistics/statistics.factor
+++ b/basis/math/statistics/statistics.factor
@@ -272,6 +272,8 @@ PRIVATE>
 
 : sample-std ( seq -- x ) 1 std-ddof ; inline
 
+ALIAS: std sample-std
+
 : signal-to-noise ( seq -- x ) [ mean ] [ population-std ] bi / ;
 
 : mean-dev ( seq -- x ) dup mean v-n vabs mean ;