What is r-atlas?
ATLAS is a self-optimizing version of BLAS, the basic linear algebra subroutines, which are the basic building blocks of much of the linear algebra in R. Self-optimizing means that ATLAS, while installing itself, does a large number of tests to find out properties of your processor(s). It knows about Altivec (i.e. it detects a G4) and it uses threading if it detects more than one processor. It can make your linear algebra (solve, eigen, and friends) much faster if R is linked with ATLAS instead of the bundled BLAS. Building ATLAS will take hours on most machines, but it is well worth it. r-atlas in fink will build a version of R linked with ATLAS, which also sits in fink. All binaries from CRAN and gifi are also linked with ATLAS, but not necessarily an ATLAS optimized for your particular machine. Let me take the opportunity to recommend everybody to upgrade to 10.2 or even 10.2.1 -- it does make quite a bit of difference in speed, and in the available tools, and everybody is now developing for 10.2.
On Wednesday, October 30, 2002, at 09:13 PM, David J. Braden wrote:
Hi, Thanks to recent threads here and a *lot* of help from Jan, I am learning how to set up my Mac (OS 10.1.5) to run R w/ XFree86. I'm finking my way along a steep learning curve, have managed to get up to version 1.5.1-1 through fink update-all. (1) fink list "r-*" reveals file r-atlas. Should I install that in addition to r-base and r-recommended? (2) I have been seeing "atlas" crop up in other places. Does it have a special significance within Unix? Thanks to you all. Regards, Dave Braden On Tuesday, October 29, 2002, at 01:45 AM, David J. Braden wrote:
I agree with Stefan: the thread with Jean-Pierre, Don and Jan proved a big help to me as well. Thanks to that thread I was able to bootstrap my Mac into what I think is a working system (with OS-X 10.1.5, XDarwin, OroborOSX, etc.). I can run the compiled version of R 1.6.0 just fine, but when I run R from a terminal session, executing demo(), I am getting version 1.4.1 (2002-01-30), in spite of latest fink update. Further, sometimes when I run it, output scrolls to the terminal window to a hilighted (END) followed by my cursor. Is this normal? Sorry for this; I'm trying, really I am... TIA Dave Braden
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=== Jan de Leeuw; Professor and Chair, UCLA Department of Statistics; Editor: Journal of Multivariate Analysis, Journal of Statistical Software US mail: 9432 Boelter Hall, Box 951554, Los Angeles, CA 90095-1554 phone (310)-825-9550; fax (310)-206-5658; email: deleeuw@stat.ucla.edu homepage: http://gifi.stat.ucla.edu ------------------------------------------------------------------------ ------------------------- No matter where you go, there you are. --- Buckaroo Banzai http://gifi.stat.ucla.edu/sounds/nomatter.au ------------------------------------------------------------------------ -------------------------