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fslaborg / Deedle

Easy to use .NET library for data and time series manipulation and for scientific programming
http://fslab.org/Deedle/
BSD 2-Clause "Simplified" License
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Throw exception in grouping functions if frame contains missing values #405

Closed sebhofer closed 5 years ago

sebhofer commented 5 years ago

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.

zyzhu commented 5 years ago

The exceptions look intuitive. Thanks!