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Commit b5347a46 authored by Burak Yavuz's avatar Burak Yavuz Committed by Reynold Xin
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[SPARK-7248] implemented random number generators for DataFrames

Adds the functions `rand` (Uniform Dist) and `randn` (Normal Dist.) as expressions to DataFrames.

cc mengxr rxin

Author: Burak Yavuz <brkyvz@gmail.com>

Closes #5819 from brkyvz/df-rng and squashes the following commits:

50d69d4 [Burak Yavuz] add seed for test that failed
4234c3a [Burak Yavuz] fix Rand expression
13cad5c [Burak Yavuz] couple fixes
7d53953 [Burak Yavuz] waiting for hive tests
b453716 [Burak Yavuz] move radn with seed down
03637f0 [Burak Yavuz] fix broken hive func
c5909eb [Burak Yavuz] deleted old implementation of Rand
6d43895 [Burak Yavuz] implemented random generators
parent 69a739c7
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