[datatable-help] Speeding up column references with roll

[Arunkumar Srinivasan]

The README would be easier to understand if DT was not undefined in 
the README. As it stands none of the examples are runnable. 
Will try to get this more reproducible where possible, ASAP.


Arun

From: Gabor Grothendieck ggrothendieck at gmail.com
Reply: Gabor Grothendieck ggrothendieck at gmail.com
Date: June 30, 2014 at 8:21:38 PM
To: Arunkumar Srinivasan aragorn168b at gmail.com
Cc: Stavros Macrakis (Σταῦρος Μακράκης) macrakis at alum.mit.edu, datatable-help at r-forge.wu-wien.ac.at datatable-help at r-forge.wu-wien.ac.at
Subject:  Re: [datatable-help] Speeding up column references with roll  

On Mon, Jun 30, 2014 at 1:00 PM, Arunkumar Srinivasan  
<aragorn168b at gmail.com> wrote:  
> Once again, has been fixed in 1.9.3. Now join requires `by=.EACHI`  
> (explicit) to perform a by-without-by.  
> https://github.com/Rdatatable/data.table/blob/master/README.md  

The README would be easier to understand if DT was not undefined in  
the README. As it stands none of the examples are runnable.  
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