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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 (769)
Replies Last Post Views
using lapply to subset mant data.tables by statquant3
2
by statquant3
bug in merge when a table is keyed? by Carlos Alberto
3
by Arunkumar Srinivasan
Memory usage of data.table chaining by Mick Cooney
3
by Arunkumar Srinivasan
bug in merge when a table is keyed? by Carlos Alberto
0
by Carlos Alberto
extracting columns dynamically by Ben Tupper-2
5
by Arunkumar Srinivasan
Subsetting within groups. by gerald.jean
1
by Arunkumar Srinivasan
Best way to apply function to set of columns to create new columns where the function requires other columns from data.table by Marc Halperin
1
by Frank Erickson-2
export from r by Ingeborg
1
by jholtman
can one name a collection of columns by specifying just the first and the last column by Farrel Buchinsky
10
by mbacou
loading etf price data into matrix in R by Robert S
0
by Robert S
whole data.table copied "warning" by statquant3
3
by Arunkumar Srinivasan
unique() not working. Is it me or the code? by Farrel Buchinsky
3
by Arunkumar Srinivasan
number of rows selected in .SD subset by Ben Tupper-2
5
by Arunkumar Srinivasan
Using := in .onLoad by juancentro
16
by Mick Cooney
data frame search by trotter12
0
by trotter12
Re: datatable-help Digest, Vol 59, Issue 2 by juancentro
4
by juancentro
best way of eval-ing a list of quoted expressions by Frank Erickson-2
0
by Frank Erickson-2
Append missing characters to character variable to bring to a standard length by Santosh Srinivas
2
by Santosh Srinivas
fread() without quoting? by Harish-3
0
by Harish-3
data table help by cwmm
0
by cwmm
Import matrix? by csjoqvis
0
by csjoqvis
Ordering of filter expressions by Johann Hibschman-3
6
by Johann Hibschman-3
Video of talk at H2O World by Matthew Dowle
4
by James Eales
beginner to R - Need assistance with graphing data by egvillal16
0
by egvillal16
Rolling Joins Replicated in Java MapReduce by dnlbrky
0
by dnlbrky
Rolling Joins Replicated in Java MapReduce by Mike.Gahan
1
by Michael Smith
Sharing a win! by Thell Fowler
0
by Thell Fowler
Error in use with package SNPath by omo004
1
by Arunkumar Srinivasan
Changing data.table row entries based on whether NA is given by JauntyJJS
0
by JauntyJJS
Subsetting Bug? by Michael Smith
6
by Michael Smith
Sistematically construction of 2 variables in data table by Frank S.
4
by Frank S.
to determine the independent variables in any data-set? by caner1617
0
by caner1617
How we do that to determine the independent variables in data? by caner1617
0
by caner1617
Remove some data table rows based on three conditions by Frank S.
3
by Frank S.
Error in row filtering by Harish-3
1
by Harish-3
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