Throw exception in grouping functions if frame contains missing values#405
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zyzhu merged 1 commit intofslaborg:masterfrom Aug 7, 2018
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The exceptions look intuitive. Thanks! |
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Throw error when trying to group by column with missing values. This leads to unexpected results (see, e.g., #253). This is not really a fix, but grouping on missing values seemsill-defined anyway. This is a cleaned up version of #380.