datatable-help

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Questions and discussion about the data.table package in R. The package extends data.frame to provide keys, fast grouping, fast extract and fast joins in a short and flexible syntax.
data.table's homepage is here.
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Topics (1348)
Replies Last Post Views
Mainting key columns after `transform` by Steve Lianoglou-6
1
by Matthew Dowle
data.table wiki has grown (a bit) by Matthew Dowle
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by Santosh Srinivas
Fast first row of each group by Matthew Dowle
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by Matthew Dowle
Cox Proportional Hazard Model Problem by jono43
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by jono43
Something seems funky. I think with character-to-factor conversion for keys (?) by Steve Lianoglou-6
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by Steve Lianoglou-6
Idea/feature request by Steve Lianoglou-6
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by Steve Lianoglou-6
Puzzling issue by Damian Betebenner-2
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by Matthew Dowle
Making merge.data.table more like merge.data.frame, part II by Steve Lianoglou-6
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by Matthew Dowle
Adding the S4-ization patch by Steve Lianoglou-6
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by Matthew Dowle
Bug when by=key(DT) by Steve Lianoglou-6
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by Matthew Dowle
Have a patch for mere.data.table to take `suffixes` param like merge.data.frame by Steve Lianoglou-6
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by Short, Tom-2
How to use datatable in S4 class? by Peter Jackson
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by Steve Lianoglou-6
v1.5.3 has just been pushed to CRAN by Matthew Dowle
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by mbacou
data.table wiki by Matthew Dowle
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by Matthew Dowle
lapply on .SD example, and dropping names in functions by Matthew Dowle
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by Matthew Dowle
Question on inconsistent behavior by Damian Betebenner-2
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by Damian Betebenner-2
Re: using character vector as input argument to setkey (data.tablepakcage) by Matthew Dowle
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by Matthew Dowle
Joins in data.table by Harish-3
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by Matthew Dowle
Cannot access cols of y when doing x[y, ...] by pchalasani
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by Matthew Dowle
Fixed 'grp.1' annoyance when j returns a subset of .SD by Matthew Dowle
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by Matthew Dowle
Bug in merge for data.table? by Joseph Voelkel
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by Joseph Voelkel
key disappears after merge of data tables by Joseph Voelkel
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by Joseph Voelkel
Stackoverflow thread comparing merge times by Matthew Dowle
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by Matthew Dowle
Summing over many variables. A new approach; a new problem by Joseph Voelkel
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by Joseph Voelkel
Bug in subsetting/iterating over a data.table with 1 row(?) by Steve Lianoglou-6
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by Steve Lianoglou-6
Summing over many variables by Joseph Voelkel
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by Matthew Dowle
Something strange with scoping(?) when data.table is used inside a package I'm developing. by Steve Lianoglou-6
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by Matthew Dowle
Unbalanced nested repeated measures ANOVA by anairc
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by Matthew Dowle
Streamlining unit tests with test_that by Steve Lianoglou-6
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by Matthew Dowle
QuickBooks by amberjoe
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by mikelue
Use of data.table with doMC/foreach by Damian Betebenner-2
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by Tom Short-2
Using data.table within another package/scoping by Damian Betebenner-2
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by Damian Betebenner-2
Detailed verbose after common data operations? by mbacou
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by Matthew Dowle
Is data.table ready for prime-time and sensitive work? by mbacou
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by mbacou
Playing nice(r) with S4? by Steve Lianoglou-6
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by Matthew Dowle
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