[R] Using subset to filter data table

[Phil Spector]

Ben -
    droplevels was introduced in R version 2.12.0. 
Since you are running version 2.10.1, it won't be
available.  You might want to upgrade to a more
recent version.

 					- Phil Spector
 					 Statistical Computing Facility
 					 Department of Statistics
 					 UC Berkeley
 					 spector at stat.berkeley.edu


On Thu, 20 Jan 2011, Ben Harrison wrote:

> Thank you Santosh.
>
> I am so new to R that I don't even have droplevels:
> 1> tcc2 = droplevels(tcc)
> Error: could not find function "droplevels"
>
> I looked up ?droplevels:
> 1> ?droplevels
> No documentation for 'droplevels' in specified packages and libraries:
> you could try '??droplevels'
> 1> ??droplevels
> Help files with alias or concept or title matching ?droplevels? using
> fuzzy matching:
>
>
> gdata::drop.levels      Drop unused factor levels
>
>
> Type '?PKG::FOO' to inspect entry 'PKG::FOO TITLE'.
>
>
> However, droplevels is in the base package apparently, yet I haven't got it.
> Can anyone explain this to me?
>
> 1> R.version
>               _
> platform       i486-pc-linux-gnu
> arch           i486
> os             linux-gnu
> system         i486, linux-gnu
> status
> major          2
> minor          10.1
> year           2009
> month          12
> day            14
> svn rev        50720
> language       R
> version.string R version 2.10.1 (2009-12-14)
>
> Ben.
>
>
>
>
> On 19 January 2011 19:27, Santosh Srinivas <santosh.srinivas at gmail.com>wrote:
>
>> tcc.new2 <- droplevels(tcc.new)
>>
>>
>
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