[R] R benchmark, moble Pentium III, 1.13 GHs

[Philippe Grosjean]

Hi Jason,

I suppose you installed the Matrix library, and it is working on your computer? If yes, may be det.Matrix() was removed, or renamed in the Matrix library you have (I cannot check this for the latest version, because I am away of the office until August 1st), but I will do that next week.

In the meantime, you can replace 'det.Matrix' by 'det.default', and it should run. Do not compare the timing for this particular test, with other results if you mqke this change. Anyway, as pointed out by Prof. Brian Ripley some times ago (and I think, also, in the online help), the determinant of a matrix is seldom used in the various algorithms in R, and it is thus a poor indicator of the potentials of the software for data analysis. As always, take the results of this benchmark with care: only few functions tested, not a "real work" comparison, etc... The best being probably to supplement this benchmark with some of your favorite scripts that you run on the various machines you want to compare. This way, you get a better idea for your pqrticulqr work.

Best,

Philippe Grosjean

---------- Original Message ----------------------------------
From: Jason Liao <jg_liao at yahoo.com>
Date:  Thu, 24 Jul 2003 07:50:41 -0700 (PDT)

>I got the following using the benchmark program at
>http://www.sciviews.org/other/benchmark.htm
>
>under Windows 2000 prof., 256 MB of RAM
>
> R Benchmark 2
>   =============
>Number of times each test is run__________________________:  3
>
>   I. Matrix calculation
>   ---------------------
>Creation, transp., deformation of a 1500x1500 matrix (sec): 
>1.97333333333333 
>800x800 normal distributed random matrix ^1000______ (sec): 
>2.80999999999999 
>Sorting of 2,000,000 random values__________________ (sec): 
>1.20333333333333 
>700x700 cross-product matrix (b = a' * a)___________ (sec): 
>1.84000000000000 
>Linear regression over a 600x600 matrix (c = a \ b') (sec): 
>2.43666666666666 
>                      --------------------------------------------
>                 Trimmed geom. mean (2 extremes eliminated): 
>2.06825841067831 
>
>   II. Matrix functions
>   --------------------
>FFT over 800,000 random values______________________ (sec): 
>1.61666666666666 
>Eigenvalues of a 320x320 random matrix______________ (sec): 
>1.20333333333333 
>Error in eval(expr, envir, enclos) : couldn't find function
>"det.Matrix"
>Timing stopped at: 0 0 0 NA NA 
>> 
>
>
>
>=====
>Jason G. Liao, Ph.D.
>Division of Biometrics
>University of Medicine and Dentistry of New Jersey
>335 George Street, Suite 2200
>New Brunswick, NJ 08903-2688
>phone (732) 235-8611, fax (732) 235-9777
>http://www.geocities.com/jg_liao
>
>______________________________________________
>R-help at stat.math.ethz.ch mailing list
>https://www.stat.math.ethz.ch/mailman/listinfo/r-help
>

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 ) ) ) ) )      
( ( ( ( (       Philippe Grosjean 
( ( ( ( ( 	Marine Biol. Lab., ULB, Belgium 
 ) ) ) ) )	Mariculture & Biostatistic  
( ( ( ( (               	           		     
 ) ) ) ) )	SciViews project coordinator
( ( ( ( ( 	(http://www.sciviews.org)	    
 ) ) ) ) )	email:phgrosje at ulb.ac.be 
( ( ( ( (                     	        
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