[datatable-help] Strange key behaviour with character string (involving spaces)

[Matthew Dowle]

Hi,

The paste added another space, so there are two spaces  ;)

> test["a  1"]
      Var1 Var2
 [1,] a  1    1
 [2,] a  1    2
 [3,] a  1    3
 [4,] a  1    4
 [5,] a  1    5
 [6,] a  1    6
 [7,] a  1    7
 [8,] a  1    8
 [9,] a  1    9
[10,] a  1   10
>


> Hi,
>
> I noticed some unexpected behaviour:
>
>
>> key(test) <- "Var1"
>> test["a 1"]
>      Var1 Var2
> [1,]  a 1   NA
>> test <- data.table(expand.grid(c(paste("a ", 1:10), "b"),1:10))
>> key(test) <- "Var1"
>> test["b"]
>       Var1 Var2
>  [1,]    b    1
>  [2,]    b    2
>  [3,]    b    3
>  [4,]    b    4
>  [5,]    b    5
>  [6,]    b    6
>  [7,]    b    7
>  [8,]    b    8
>  [9,]    b    9
> [10,]    b   10
>> test["a 1"]
>      Var1 Var2
> [1,]  a 1   NA
>>
>
>
> That is, subsetting a keyed data.table by a string that contains a
> space seems to break it? Am I missing something?
>
> Timothee
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