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 (6175)
Replies Last Post Views
Passing user defined functions as part of the j argument by Damian Betebenner-2
2
by djmuseR
Suggest a cool feature: Use data.table like a sorted / indexed data.list? by Branson Owen
5
by Branson Owen
v1.5 is on CRAN by Matthew Dowle
0
by Matthew Dowle
Inheritance currently needs packages to have a namespace by Matthew Dowle
0
by Matthew Dowle
Parallelize data.table's operations? by Branson Owen
2
by Branson Owen
Bug in data.table crashes R by steve border
1
by Matthew Dowle
Input a matrix table text file as a vector by xinxo
1
by xinxo
Data table syntax by Damian Betebenner-2
12
by Matthew Dowle
Programmatic by clauses by Johann Hibschman-4
6
by Matthew Dowle
Report an unexpected behavior in data.table 1.5 by Branson Owen
6
by Matthew Dowle
Efficient conversion of data table column to vector by Nicolas Chapados
5
by Matthew Dowle
Unexpected behavior with mult="all" by Harish-3
9
by Harish-3
Automagic timezone convertion on data.table rbind by Nicolas Chapados
3
by Matthew Dowle
Windows R-Forge build appears 18 days stale by Matthew Dowle
1
by Matthew Dowle
How to Adaptively Set Up the Coordinate Range of Multiple Graphs in One Figure by Wonsang You
1
by Matthew Dowle
Auto-convert characters to factors when settings keys? by Steve Lianoglou-6
27
by Steve Lianoglou-6
Environment of eval() execution for "j" appears to vary inexplicably by Harish-3
9
by Matthew Dowle
Testing 123 by Matthew Dowle
0
by Matthew Dowle
DT[NA] now returns 1 row of NA by Matthew Dowle
0
by Matthew Dowle
Gmane mirror by Matthew Dowle
0
by Matthew Dowle
Return Select/Join that does NOT match? by Branson Owen
7
by Matthew Dowle
Error when using eval() in j by Harish-3
1
by Matthew Dowle
Wonder whether there is an easier way to change part of data.table values by Branson Owen
7
by Short, Tom-2
Dataset "election.2008" by Ruser007
1
by David Freedman
Nabble mirror by Matthew Dowle
1
by Matthew Dowle
Unexpectedly getting "Didn't allocate enough rows..." by Harish-3
4
by Matthew Dowle
Ran into infinite loop when setting key/sorting columns with NA by Branson Owen
3
by Branson Owen
data.table indexing approaches by Short, Tom-2
1
by Matthew Dowle
Fixed large slow down introduced in v1.5 by Matthew Dowle
0
by Matthew Dowle
Can crash R with a data.table query by Harish-3
15
by Harish-3
data.table in functions by Sasha Goodman
4
by Matthew Dowle
Top N Items [was: Environment of eval() execution for "j" appears to vary inexplicably] by Harish-3
3
by Short, Tom-2
Expressions in "by" criteria (again) by Mike Sandfort
6
by Harish-3
Unable to find difference between two IDates by Harish-3
4
by Harish-3
Merging where key is large by Damian Betebenner-2
8
by Damian Betebenner-2
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