Thanks, Henrik, for the helpful response. Your package was helpful indeed!
However, I would still like to see this in the base package. 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
