From oliver at first.in-berlin.de  Thu Apr 19 20:34:13 2012
From: oliver at first.in-berlin.de (oliver)
Date: Thu, 19 Apr 2012 20:34:13 +0200
Subject: [Rd] Column(row)wise minimum and maximum
In-Reply-To: <20120419183156.GA2692@siouxsie>
References: <2F9EA67EF9AE1C48A147CB41BE2E15C31CD747@DOM-EB-MAIL2.win.ad.jhu.edu>
	<20120419183156.GA2692@siouxsie>
Message-ID: <20120419183413.GC2510@siouxsie>

On Thu, Apr 19, 2012 at 08:31:56PM +0200, oliver wrote:
> On Thu, Apr 19, 2012 at 06:12:30PM +0000, Ravi Varadhan wrote:
> > Hi,
> > 
> > Currently, the "base" has colSums, colMeans.  It seems that it would be
> > useful to extend this to also include colMin, colMax (of course, rowMin and
> > rowMax, as well) in order to facilitate faster computations for large vectors
> > (compared to using apply).  Has this been considered before?  Please forgive me
> > if this has already been discussed before.
> [...]
> 
> Not sure if the performance of apply is so much of a problem,
> but also from a view of consistency of the provided
> functions, I think offering such functions would make
> it more clear and consitent to use R here, because
> all those functions are then available for row and col
> and the functionality is appended in the name (Mean, Sum etc.).
> 
> I think the basic things that should be available woud be:
> 
>  - mean
>  - median
>  - min
>  - max
>  - var
>  - sd
   - sum   :-)
   - diff


Ciao,
   Oliver



[Rd] Column(row)wise minimum and maximum
oliver