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[R-Forge #5582] When DT is empty, unique(DT, by=key(DT)) returns a data.table with one row, all NAs #28

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arunsrinivasan opened this issue Jun 8, 2014 · 0 comments

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arunsrinivasan commented Jun 8, 2014

Submitted by: shubh bansal; Assigned to: Arun ; R-Forge link

dt=data.table(a=character(0), b=numeric(0), key='a')
unique(dt)
#     a  b
#1: NA NA

arunsrinivasan closed this as completed

arunsrinivasan added this to the v1.9.4 milestone

arunsrinivasan added the Medium label

arunsrinivasan self-assigned this

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