Jonathan Wei aa660b8751 Add docs for virtual columns and transform specs (#6119) ... * Add docs for virtual columns and transform specs * PR Comments * PR comment		2018-08-09 14:42:52 -06:00
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math-expr.md	Add docs for virtual columns and transform specs (#6119)	2018-08-09 14:42:52 -06:00
papers-and-talks.md	Add more links for talks	2015-06-05 14:35:56 -07:00