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lead/lag don't preserve factors #166

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romainfrancois opened this issue Dec 23, 2013 · 2 comments
Closed

lead/lag don't preserve factors #166

romainfrancois opened this issue Dec 23, 2013 · 2 comments
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@hadley
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bug an unexpected problem or unintended behavior
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v0.1.2

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@romainfrancois
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Found this behavior while tackling #133

> f <- factor(c("a", "b", "a") )
> f
[1] a b a
Levels: a b
> lead(f, 1)
[1]  2  1 NA
> lag(f,1)
[1] NA  1  2

Is this intended ?
@ghost ghost assigned hadley Dec 23, 2013
@hadley
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hadley commented Dec 26, 2013

Ooops, definitely not. I really to get in the habit of checking with factors, dates and times.

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hadley commented Jan 29, 2014

See also http://stackoverflow.com/questions/21435329

@hadley hadley closed this as completed in b87c090 Feb 3, 2014
@hadley hadley modified the milestones: v0.1.2, v0.2 Feb 17, 2014
@acthomasca acthomasca mentioned this issue Jun 13, 2015
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