On Mon, 2004-05-31 at 11:39, Douglas Bates wrote: > I should have read your message more carefully. Those three Fortran > routines that you mention are single precision and it would be silly > to use them on modern computers. R only provides single precision > floating point for compatibility. All numerical linear algebra is > doing in double precision. Check where sgefa and sgesl are being > called and see if they really need to be in single precision. I'm > sure if you replace them by calls to dgefa and dgesl (and suitably > change the precision of the arguments) they will run as fast as > before.
Thanks. I have replaced sgefa and sgesl with dgefa and dgesl. The results are confirmed by running the compiled Fortran code. I will convey this to the original author. > In fact you can probably use the Lapack routines dgetrf and > dgetrs instead and get a performance boost. I will try to improve later. -- Zhu Wang ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
