Re: [R] bug in 'margins' behavior in reshape - cast

From: mfrumin <michael_at_frumin.net>
Date: Thu, 31 Jul 2008 05:46:18 -0700 (PDT)

sounds great. there are often times I'd like to use reshape on data frames of hundreds of thousands or millions of rows, but I have found that it is just too slow at this point to be convenient.

thanks again for everything,
Mike

hadley wrote:
>
> On Thu, Jul 31, 2008 at 4:59 AM, Michael Frumin <michael@frumin.net>
> wrote:

>> thanks, that workaround, well, works!
>>
>> what are you working on with the rewrite?  just efficiency?  or major
>> changes in functionality/interface?

>
> I've come up with a strategy that makes reshape _much_ faster - 10-20x
> for pure reshaping and 3-5x for aggregating - while reducing the
> amount of code and making it much easier to understand how it works.
> I'm also fixing a few small deficiencies in functionality that have
> been bugging me for a while. The interface will remain basically the
> same.
>
> Hadley
>
>
> --
> http://had.co.nz/
>
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