[datatable-help] Change in list( ) behavior inside join
nachti
kpm.nachtmann at gmail.com
Tue Apr 15 17:10:01 CEST 2014
Hi there!
Just another example (maybe to be included to test.data.table), which does
not do, what I expected (v. 1.9.2 - it's also fixed in 1.9.3)
> require(data.table)
> sessionInfo()
R version 3.1.0 (2014-04-10)
Platform: powerpc64-unknown-linux-gnu (64-bit)
...
other attached packages:
[1] data.table_1.9.2
> example(data.table)
> DT
x y v v2 m
1: a 1 42 NA 42
2: a 3 42 NA 42
3: a 6 42 NA 42
4: b 1 4 84 5
5: b 3 5 84 5
6: b 6 6 84 5
7: c 1 7 NA 8
8: c 3 8 NA 8
9: c 6 9 NA 8
> setkey(DT)
> DT[J("a"), list(v, y)]
x v y
1: a 42 1
> DT[J("a"), list(v, y, i = "text")]
x v y i
1: a 42 1 text
##### With data.table 1.9.3 it's working fine:
> require(data.table)
> sessionInfo()
R version 3.1.0 (2014-04-10)
Platform: powerpc64-unknown-linux-gnu (64-bit)
...
other attached packages:
[1] data.table_1.9.3
> example(data.table)
> setkey(DT)
> DT[J("a"), list(v, y)]
v y
1: 42 1
2: 42 3
3: 42 6
> DT[J("a"), list(v, y, i = "text")]
v y i
1: 42 1 text
2: 42 3 text
3: 42 6 text
nachti
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