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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 (737)
Replies Last Post Views
Remove some data table rows based on three conditions by Frank S.
2
by mbacou
Error in row filtering by Harish-3
1
by Harish-3
v1.9.4 is now on CRAN by Matthew Dowle
0
by Matthew Dowle
Random Forest by retter
2
by Michael Smith
Two short questions about the operation of data table by Frank S.
3
by Frank S.
Stability of Duplicate Column Renaming in Version 1.9.3 by Christian Sigg-3
0
by Christian Sigg-3
Replace missings by dates in data table by Frank S.
4
by Frank S.
NA in joins by juancentro
5
by Arunkumar Srinivasan
Update table from other table by juancentro
6
by Arunkumar Srinivasan
To apply different instructions in data table by Frank S.
2
by Frank S.
Two way table with weigth variable by jfca283
0
by jfca283
Unexpected Result Reading in Data File using fread by Martin Watts
1
by Arunkumar Srinivasan
Error message after using the function "Match" to match data with R by Cristina Rojo-Gimeno
0
by Cristina Rojo-Gimeno
I'd like to add you to my professional network on LinkedIn by Farrel Buchinsky
0
by Farrel Buchinsky
(1.9.2) data.table crash when assign N values to N<1 rows by Alan Kwan
1
by Arunkumar Srinivasan
Extracting specific values from a matrix by gcarvallob
1
by Mike.Gahan
fread for bin file? by Alan Kwan
0
by Alan Kwan
operations (+, -, /, *) on unequal-sized data.table - Question from Stack Overflow by iembry
0
by iembry
Unexpected behaviour using fast grouping by Tom Harrop
1
by Arunkumar Srinivasan
lapply without anonymous function by gsee
5
by Arunkumar Srinivasan
Replace a character in one data table column by Frank S.
4
by Frank S.
fread statement for a long data table by Frank S.
6
by Frank S.
1.9.4 Release Date by Michael Smith
1
by Michele
New column with conditions for first and last observation by id group by Frank S.
6
by Frank S.
Cannot convert from data.frame to data.table inside RStudio by jpbowman01
3
by Arunkumar Srinivasan
Fwd: problems with modifying colnames by Francois Pepin-3
1
by Michael Nelson
Subsetting a data table and add a new column in one step by Frank S.
2
by Frank S.
seq with data.table by marcos.takahashi
1
by ahardjasa
Setting the key of a table produced by merging reorders original table if key column was used as by column by ahardjasa
0
by ahardjasa
Construct a new data table from another by Frank S.
4
by Frank S.
Subsetting By Row Function by bgoldstein
5
by natus
I have been agnozing over how to do a running cummulative sum over a particular date range by Farrel Buchinsky
6
by Mike.Gahan
I have been agnozing over how to do a running cummulative sum over a particular date range by Farrel Buchinsky
0
by Farrel Buchinsky
useR2014 by Matthew Dowle
2
by Matthew Dowle
data.table vs matrix speed by Steve Bellan-2
2
by Matthew Dowle
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