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 (1360)
Replies Last Post Views
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
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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
data.table - sort key - columns with real numbers by Desmond Wee
3
by Harish-3
Large speedup using .Internal with data.table by Matthew Dowle
1
by Matthew Dowle
Unable to have expression for "by" criteria by Harish-3
7
by Matthew Dowle
Not getting behavior described in FAQ by Harish-3
2
by Matthew Dowle
convenience function for transforming variables, and adding them to the table by Sasha Goodman
2
by Matthew Dowle
data.table question: ave like behavior by Ozan Bakış
2
by Ozan Bakış
Access to local variables in "j" expressions by Johann Hibschman-3
7
by Short, Tom-2
data.table 1.4.1 now on CRAN by Matthew Dowle
0
by Matthew Dowle
Package data.table_1.4.1.tar.gz has been built for Windows by Uwe Ligges-2
0
by Uwe Ligges-2
Is the (re-)sorting of a data.table by setting its key stable? by Steve Lianoglou-6
1
by Short, Tom-2
[R] Using plyr::dply more (memory) efficiently? by Matthew Dowle
2
by Matthew Dowle
data.table 1.4 by Matthew Dowle
5
by Matthew Dowle
Integer date and time classes for use with data.table by Short, Tom-2
2
by Matthew Dowle
hey all by Rob Forler
0
by Rob Forler
[Datatable-help] Testing 123 by Matthew Dowle
0
by Matthew Dowle
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