Matrix identification bug (PR#1361)
On Tue, 5 Mar 2002 hyu@stats.uwo.ca wrote:
Full_Name: Hao Yu Version: 1.4.1 OS: Windws and Linux Submission from: (NULL) (129.100.45.161)
[...]
the result was (PIII Xeon 1GHz RedHat 7.2 Linux))
system.time(solve.Matrix(Toeplitz(.5^seq(0,999))))
[1] 9.76 0.22 9.97 0.00 0.00 Clearly there are some bugs in solve() and solve.Matrix(). Notice that all have
Nothing in this report suggests a bug in solve(). Can you please provide some evidence for your claim (which is not `clear' to me), and
solve
function (a, b, ...)
UseMethod("solve")
seems hard to get wrong! (It matters: solve is part of R: solve.Matrix is
a contributed addon.)
Incidentally, these sort of timings are crucially dependent on the BLAS
library used, and in my experience that is a far larger factor that the OS
used. However, that was not part of the report ....
Brian D. Ripley, ripley@stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272860 (secr) Oxford OX1 3TG, UK Fax: +44 1865 272595 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-devel 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-devel-request@stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._