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r-devel list, I have recently written an R package that solves a linear least squares problem, and computes the multivariate normal density function. The bulk of the code is written in C, with interfacing code to the BLAS and Lapack libraries. The motivation here is speed. I ran into a problem computing the determinant of a symmetric matrix in packed storage. Apparently, there are no explicit

> From: Abhijit Dasgupta <adasgupta@araastat.com> > Date: October 31, 2010 1:30:02 AM EDT > To: Matt Shotwell <shotwelm@musc.edu> > Subject: Re: [R] ForestPlot or similar > > I just did something very similar using ggplot's pointrange geom. In the following, I'm plotting hazard ratios, for which the nominal value is 1 and not 0. x has 5 columns: drug, hr, hr.lcb, hr.ucb, and group, and I'm f...

Hello, I would like to compress a long string (character vector), store the compressed string in the text field of a SQLite database (using RSQLite), and then load the text back into memory and decompress it back into the the original string. My character vector can be compressed considerably using standard gzip/bzip2 compression. In theory it should be much faster for me to compress/decompress

...a character vector rather than a factor. > > Suggestions? Perhaps you should ask a question. -- David Winsemius, MD West Hartford, CT ------------------------------ Message: 66 Date: Fri, 10 Dec 2010 22:34:23 +0200 From: Tal Galili <tal.galili at gmail.com> To: Matt Shotwell <shotwelm at musc.edu> Cc: "r-help at r-project.org" <r-help at r-project.org> Subject: Re: [R] Encoding problem - I fails to read Hebrew text from online Message-ID: <AANLkTikb1HeF+5LwWqBkvav59eZLkpHx6=T6eR_sygBL at mail.gmail.com> Content-Type: text/plain Hi Matt and everyone el...

...posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > -- Bert Gunter Genentech Nonclinical Biostatistics ------------------------------ Message: 89 Date: Wed, 13 Oct 2010 15:12:17 -0400 From: Matt Shotwell <shotwelm at musc.edu> To: Henrique Dallazuanna <wwwhsd at gmail.com> Cc: Bart Joosen <bartjoosen at hotmail.com>, "r-help at r-project.org" <r-help at r-project.org> Subject: Re: [R] Regular expression to find value between brackets Message-ID: <1286997137.1644.37.camel at...

...ovide commented, minimal, self-contained, reproducible code. > -- Ista Zahn Graduate student University of Rochester Department of Clinical and Social Psychology http://yourpsyche.org ------------------------------ Message: 38 Date: Mon, 22 Nov 2010 11:09:10 -0500 From: Matt Shotwell <shotwelm at musc.edu> To: "martin.tomko at geo.uzh.ch" <martin.tomko at geo.uzh.ch> Cc: "r-help at r-project.org" <r-help at r-project.org> Subject: Re: [R] statistical test for comparison of two classifications (nominal) Message-ID: <1290442150.1756.74.camel at matt-l...

All, Just an update on the tty (formerly serial) connection patch I'm working on. Simon pointed out that a tty connection needed blocking capability and flow control. These features are added in this patch, with additional documentation (?tty). Hardware flow control (CTS/RTS, CD, etc.) would be much more involved (ioctls!), and for little gain, I think, to those of us who would use a tty

R community, As you may know, R's iconv doesn't work well converting to and from encodings that allow embedded nulls. For example > iconv("foo", to="UTF-16") Error in iconv("foo", to = "UTF-16") : embedded nul in string: '\xff\xfef\0o\0o\0' However, I don't believe embedded nulls are at issue here, but rather that R's iconv