On 1/1/10 1:40 PM, Peng Yu wrote:
> On Fri, Jan 1, 2010 at 6:52 AM, Barry Rowlingson
> wrote:
>> On Thu, Dec 31, 2009 at 11:27 PM, Peng Yu wrote:
>>> I don't see where describes the implementation of '[]'.
>>>
>>> For example, if x is a matrix or a data.frame, how the lookup of
>>> 'colname1' is
On Fri, Jan 1, 2010 at 6:52 AM, Barry Rowlingson
wrote:
> On Thu, Dec 31, 2009 at 11:27 PM, Peng Yu wrote:
>> I don't see where describes the implementation of '[]'.
>>
>> For example, if x is a matrix or a data.frame, how the lookup of
>> 'colname1' is x[, 'colname1'] executed. Does R perform a
This is my 2010 Wish list for R. Most of these have been discussed on
r-help or r-devel already so this is more of a wrap-up. The first 4
relate to R itself, the next 2 to the R environment and the last 4
relate to using R with other languages:
R
1. Strings. Some way of placing backslashes in l
On Thu, Dec 31, 2009 at 11:27 PM, Peng Yu wrote:
> I don't see where describes the implementation of '[]'.
>
> For example, if x is a matrix or a data.frame, how the lookup of
> 'colname1' is x[, 'colname1'] executed. Does R perform a lookup in the
> a hash of the colnames? Is the reference O(1) o
