Aggregate by multiple levels fails in DataFrame.sum, others #545

wesm opened this Issue Dec 26, 2011 · 0 comments


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@wesm wesm added a commit that referenced this issue Dec 29, 2011
@wesm wesm BUG: fix aggregating multiple levels in DataFrame stat ops, use cytho…
…nized groupers when possible for > 15x speedup, GH #545
@wesm wesm closed this Dec 29, 2011
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