Hi, On Thu, Apr 19, 2012 at 4:33 PM, Ravi Varadhan <rvarad...@jhmi.edu> wrote: > Thanks, Henrik, for the helpful response. Your package was helpful indeed! > > However, I would still like to see this in the base package.
For what it's worth, I think they'd be useful to have there, too. -steve > > Ravi > > -----Original Message----- > From: henrik.bengts...@gmail.com [mailto:henrik.bengts...@gmail.com] On > Behalf Of Henrik Bengtsson > Sent: Thursday, April 19, 2012 3:57 PM > To: Ravi Varadhan > Cc: oliver; r-devel@r-project.org > Subject: Re: [Rd] Column(row)wise minimum and maximum > > This is why the matrixStats package was created, cf. > http://cran.r-project.org/web/packages/matrixStats/ > > 1. Yes, it would be nice to have them in one of the default packages. > 2. We decided to focus on/constrain ourselves matrices in matrixStats. > We decided not to go into arrays with length(dim(.)) >= 3. > > /Henrik > > On Thu, Apr 19, 2012 at 11:39 AM, Ravi Varadhan <rvarad...@jhmi.edu> wrote: >> Oliver, >> >> It is mainly a speed issue (and also compactness!), at least for me. Using >> `apply' is so much slower. I agree with you that having column and row >> operations available for "basic" stats operations in "base" would be great. >> >> David - I am aware of capabilities in other packages, but I am hoping that >> such basic operations would be part of "base" distribution. >> >> Ravi >> >> -----Original Message----- >> From: oliver [mailto:oli...@first.in-berlin.de] >> Sent: Thursday, April 19, 2012 2:34 PM >> To: Ravi Varadhan >> Cc: r-devel@r-project.org >> Subject: Re: [Rd] Column(row)wise minimum and maximum >> >> 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 >> ______________________________________________ >> R-devel@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-devel > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel -- Steve Lianoglou Graduate Student: Computational Systems Biology | Memorial Sloan-Kettering Cancer Center | Weill Medical College of Cornell University Contact Info: http://cbio.mskcc.org/~lianos/contact ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
