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[R-Forge #5760] GForce should work with .N #334

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arunsrinivasan opened this issue Jun 8, 2014 · 0 comments
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[R-Forge #5760] GForce should work with .N #334

arunsrinivasan opened this issue Jun 8, 2014 · 0 comments
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feature request
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v1.9.4

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

At the moment, if one does:

DT[, list(mean(x), mean(y)), by=z]

It'll be optimised to use GForce. However, doing

DT[, list(.N, mean(x), mean(y)), by=z]

will result in dogroups instead of GForce, which could be slower. This case can be optimised relatively easily. Will do.
@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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