[datatable-help] Possible bug in 1.9.x versions

[Matt Dowle]

 From those messages,  it looks like the install didn't work properly.  
This can happen on Windows if another process is still using the older .dll.

On every release we usually do get reports like this.

Since it is Windows,  let's try overkill first :

1. Close all R sessions
2. To be sure,  reboot.  This ensures all locks on open .dlls are fully 
cleared.
3. Start R
4. remove.package("data.table")
5. install.packages("data.table")
6. require(data.table)
7. test.data.table()  -- does it work?
8. Rerun test

The Windows .zip for 1.9.2 is now on the homepage,  so it's best to use 
that one please.

Matt

On 27/02/14 15:05, carrieromichele wrote:
> I just installed the new data.table versions. I tried both 
> 1.9.0, available (binary) at 
> http://datatable.r-forge.r-project.org/data.table_1.9.0.zip, and 1.9.2 
> (CRAN) building from source (using Rtools)
>
> After installing I run my BAU scripts and found out that I had 
> different results... this is what I could made reproducible
>
> 1.8.10
>
> > library(data.table)
> data.table 1.8.10  For help type: help("data.table")
> > set.seed(1)
> > dt <- data.table(id=rep(1:4, each=3),
> +                  var1 = rep(letters[1:3], 4),
> +                  var2 = rnorm(12),
> +                  key="id,var1")
> > dt
>     id var1       var2
>  1:  1    a -0.6264538
>  2:  1    b  0.1836433
>  3:  1    c -0.8356286
>  4:  2    a  1.5952808
>  5:  2    b  0.3295078
>  6:  2    c -0.8204684
>  7:  3    a  0.4874291
>  8:  3    b  0.7383247
>  9:  3    c  0.5757814
> 10:  4    a -0.3053884
> 11:  4    b  1.5117812
> 12:  4    c  0.3898432
> >
> > key(dt)
> [1] "id"   "var1"
> > dt[.(unique(id)), list(var1, var2)]
>     id var1       var2
>  1:  1    a -0.6264538
>  2:  1    b  0.1836433
>  3:  1    c -0.8356286
>  4:  2    a  1.5952808
>  5:  2    b  0.3295078
>  6:  2    c -0.8204684
>  7:  3    a  0.4874291
>  8:  3    b  0.7383247
>  9:  3    c  0.5757814
> 10:  4    a -0.3053884
> 11:  4    b  1.5117812
> 12:  4    c  0.3898432
>
> 1.9.0
>
>
> > library(data.table)
> data.table 1.9.0  For help type: help("data.table")
> Warning message:
> package 'data.table' was built under R version 3.1.0
> > set.seed(1)
> > dt <- data.table(id=rep(1:4, each=3),
> +                  var1 = rep(letters[1:3], 4),
> +                  var2 = rnorm(12),
> +                  key="id,var1")
> > dt
>     id var1       var2
>  1:  1    a -0.6264538
>  2:  1    b  0.1836433
>  3:  1    c -0.8356286
>  4:  2    a  1.5952808
>  5:  2    b  0.3295078
>  6:  2    c -0.8204684
>  7:  3    a  0.4874291
>  8:  3    b  0.7383247
>  9:  3    c  0.5757814
> 10:  4    a -0.3053884
> 11:  4    b  1.5117812
> 12:  4    c  0.3898432
> >
> > key(dt)
> [1] "id"   "var1"
> > dt[.(unique(id)), list(var1, var2)]
>     id var1       var2
>  1:  1    a -0.6264538
>  2:  1    a  0.1836433
>  3:  1    a -0.8356286
>  4:  2    a  1.5952808
>  5:  2    a  0.3295078
>  6:  2    a -0.8204684
>  7:  3    a  0.4874291
>  8:  3    a  0.7383247
>  9:  3    a  0.5757814
> 10:  4    a -0.3053884
> 11:  4    a  1.5117812
> 12:  4    a  0.3898432
>
> 1.9.2
>
> > library("data.table", lib.loc="C:/Program Files/R/R-3.0.2/library")
> data.table 1.9.2  For help type: help("data.table")
> > set.seed(1)
> > dt <- data.table(id=rep(1:4, each=3),
> +                  var1 = rep(letters[1:3], 4),
> +                  var2 = rnorm(12),
> +                  key="id,var1")
> Error in forder(x, cols, sort = TRUE, retGrp = FALSE) :
>   object 'Cforder' not found
> > dt
>     id var1       var2
>  1:  1    a -0.6264538
>  2:  1    b  0.1836433
>  3:  1    c -0.8356286
>  4:  2    a  1.5952808
>  5:  2    b  0.3295078
>  6:  2    c -0.8204684
>  7:  3    a  0.4874291
>  8:  3    b  0.7383247
>  9:  3    c  0.5757814
> 10:  4    a -0.3053884
> 11:  4    b  1.5117812
> 12:  4    c  0.3898432
> >
> > key(dt)
> [1] "id"   "var1"
> > dt[.(unique(id)), list(var1, var2)]
> Error in `[.data.table`(dt, .(unique(id)), list(var1, var2)) :
>   object 'Cbmerge' not found
>
> It seems that in the 1.9.0 version when you join using fewer keys than 
> the whole set of keys, the first values of the remaining keys are 
> "carried forward". Other column looks fine.
>
> In the 1.9.2 instead some dependencies seem missing.
>
>
>
>
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