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datatable-help

This forum is an archive for the mailing list datatable-help@lists.r-forge.r-project.org (more options) Messages posted here will be sent to this mailing list.
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 (664)
Replies Last Post Views
fread for flat files by Mark Danese
2
by Mark Danese
dplyr vs. data.table benchmarks by brodie gaslam
0
by brodie gaslam
Subsetting with logical by Michael Smith
0
by Michael Smith
What is going on with R 3.1 ? by Michele
3
by Michele
Stilhaus Kitchens Review by angeleh
0
by angeleh
data.table and aggregating out-of-order columns in result from by by Clayton Stanley
3
by Arunkumar Srinivasan
Change in list( ) behavior inside join by Shir Levkowitz
5
by nachti
fread numerics by Gabor Grothendieck
0
by Gabor Grothendieck
Transform characters to numbers and compare by Sergio.pv
1
by Arunkumar Srinivasan
fread couldn't memory map even dropping columns by zji90
0
by zji90
fread always read the last line when skipping by Emilio Torres Manzan...
0
by Emilio Torres Manzan...
Is there any overhead to converting back and forth from a data.table to a data.frame? by caneff
4
by Steve Lianoglou-2
In 1.9.2, By with factor column do not work the same as in 1.8.10 by DERVIEUX Christophe
2
by Arunkumar Srinivasan
.I does not respect by by Gabor Grothendieck
5
by Arunkumar Srinivasan
Adding Column to Data.Table not working by bgoldstein
2
by bgoldstein
quote argument to fread by John Laing
0
by John Laing
Dissertation writing service by jshaw740
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by jshaw740
Finance Homework Help by janifar502
0
by janifar502
Re:Extraction of few columns with desired values by anisha
0
by anisha
"Error in Ops.POSIXt" using 1.9.x by dnlbrky
1
by Arunkumar Srinivasan
custom term paper writing service by janifar3011
0
by janifar3011
AM I getting crazy by statquant3
1
by statquant3
FR #2722 testing by Arunkumar Srinivasan
0
by Arunkumar Srinivasan
by=.EACHI and related - please check ok by Matthew Dowle
4
by Frank Erickson
Subtracting days by bitas1
0
by bitas1
`:=` Fails When Called From Function Inside a Package by Michael Smith
1
by Michael Smith
Weird error in package with older data.table version by szehnder@uni-bonn.de
4
by szehnder@uni-bonn.de
Is assignment such as DT[, a:=7] supposed to print DT when surrounded by braces? by Todd A. Johnson
3
by Matthew Dowle
Possible FR - but just checking opinons by Michele
2
by Michele
How to replace values in data.table conditionally by Manabu Sakamoto-2
1
by Matthew Dowle
Computer Homework Help by janifardisuja
0
by janifardisuja
checking an approach to filtering rows in a data.table by Vincent Carey 525-22...
3
by Arunkumar Srinivasan
what's wrong with my quote()-ing by PaulJohnson32gmail
1
by Matthew Dowle
setnames on copy data.table also renames original data.table object by Manabu Sakamoto-2
2
by Matthew Dowle
Odd problem using fread to read in a csv file: no data, just headers by Farrel Buchinsky
7
by Michele
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