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[R-Forge #5008] .SD drops columns if name is duplicated #86

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arunsrinivasan opened this issue Jun 8, 2014 · 1 comment
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[R-Forge #5008] .SD drops columns if name is duplicated #86

arunsrinivasan opened this issue Jun 8, 2014 · 1 comment
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v1.9.4

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Submitted by: Ricardo Saporta; Assigned to: Arun ; R-Forge link

When duplicate column names exist, .SD drops columns

DT <- data.table(x=1:3, x=11:13)

## Works Fine
DT[, names(DT)=="x", with=FALSE]

## Looses Second Column
DT[, names(DT)=="x", with=FALSE][, .SD]
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Also updated this SO post and here's the commit that fixed handling duplicate names: 9f0a7f8

@arunsrinivasan arunsrinivasan added this to the v1.9.4 milestone Jun 19, 2014
@arunsrinivasan arunsrinivasan self-assigned this Jun 20, 2014
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