To: "MIKE FLEMING"<mike_fleming_at_nass-fx@nass.usda.gov> Subject: Re: R-beta: Some General Questions From: Douglas Bates <bates@stat.wisc.edu> Date: 03 Oct 1997 15:52:39 -0500 In-Reply-To: "MIKE FLEMING"'s message of Fri, 03 Oct 97 16:19:38 -0500 I'll take a stab at answering a couple of your questions. "MIKE FLEMING"<mike_fleming_at_nass-fx@nass.usda.gov> writes: > 3. Shell commands like !pwd do not work on my installation of R like > they do for me in Splus. Does R support the use of shell commands? In R you have to fall back on the more basic function called "system". If I want to find out the current working directory I would use R> system("pwd") /home/bates/courses/st849 > 4. Is there a matrix library for R like the one used for Splus? Is > such a library needed by R? Not presently. Since the LAPACK code is freely available it would be possible to create such a library. If a library were being created I would advocate going directly to a C++ implementation of the linear algebra code, such as lapack++ or TNT (see http://math.nist.gov/tnt/) since R can interface with C++ code. =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request@stat.math.ethz.ch =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=