Preserve column order when merge/join frames

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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Preserve column order when merge/join frames #487

Closed zyzhu closed 4 years ago

zyzhu commented 4 years ago

Fix #304

This is a behavior breaking change.

The columns of merged frames will not be reordered during merge or join. User needs to call Frame.sortColsByKey explicitly to sort output frame by column keys.