search for: jg_liao

...hout having to check the vector element by element? Thanks a lot! Jason ===== 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

...ondered if there is any faster way than my own simple function distance2 = function(x1, x2) { temp = x1-x2 sum(temp*temp) } I have searched the R-help archives and can not find anything except when the arguments are matrices. Thanks for any lead. Jason Jason Liao, http://www.geocities.com/jg_liao Associate Professor of Biostatistics Drexel University School of Public Health 1505 Race Street, Mail Stop 1033 Bellet Building, 6th Floor Philadelphia, PA 19102 phone 215-762-3934 ____________________________________________________________________________________ Looking for last mi...

I am excited to learn that Prof. Tierney is bringing to us compiled R. I would like to learn when it will be available. This information will be useful in scheduling some of my projects. Thanks. Jason Jason Liao, http://www.geocities.com/jg_liao Dept. of Biostatistics, http://www2.umdnj.edu/bmtrxweb University of Medicine and Dentistry of New Jersey 683 Hoes Lane West, Piscataway‚ NJ 08854 phone 732-235-5429, School of Public Health office phone 732-235-9824, Cancer Institute of New Jersey office

...le precision value if(k>n) then value = 0. elseif(k==0) then value = 1. else if(k==n) then value = 1. else value = choose(n-1, k) + choose(n-1, k-1) end if end function program main write(*,*) choose(30, 15) end program Jason Liao, http://www.geocities.com/jg_liao Department of Epidemiology and Biostatistics Drexel University School of Public Health 245 N. 15th Street, Mail Stop 660 Philadelphia, PA 19102-1192 phone 215-762-3934

...eems that ROC curve computation is not supported on R. Anyone has some leads? Thanks. Jason ===== Jason G. Liao, Ph.D. Division of Biometrics UMDNJ School of Public Health 335 George Street, Suite 2200 New Brunswick, NJ 08903-2688 phone (732) 235-9748, fax (732) 235-9777 http://www.geocities.com/jg_liao __________________________________________________ Great stuff seeking new owners in Yahoo! Auctions! -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help&quo...

...Error in library(GeneLogit) : 'GeneLogit' is not a valid package -- installed < 2.0.0? It runs on R 1.9.0 just fine. It seems that others have encountered same problem but no solution is found by googling How can I fix this problem? Many thanks. Jason Liao, http://www.geocities.com/jg_liao Dept. of Biostatistics, http://www2.umdnj.edu/bmtrxweb University of Medicine and Dentistry of New Jersey 683 Hoes Lane West, Piscataway? NJ 08854 phone 732-235-5429, School of Public Health office phone 732-235-9824, Cancer Institute of New Jersey office

...paring R with other languages and systems. One peculiar feature of R is there is no scalar. Instead, it is just a vector of length one. I wondered how much performance penalty this deign cause, particular in situations with many scalars in a program. Thanks. Jason Liao, http://www.geocities.com/jg_liao Associate Professor of Biostatistics Drexel University School of Public Health 245 N. 15th Street, Mail Stop 660 Philadelphia, PA 19102-1192 phone 215-762-3934 ____________________________________________________________________________________ TV dinner still cooling? Check out "To...

Hello, everyone! I have spent two hours to get what I wanted in a simple situation and have not been successful. The set up is extremely simple x = c(1,2,4,8) y = c(1,2,3,4) plot(x, y) What I need, however, is for the 4 points of 1,2,4,8 to be spaced evenly, not by their numerical scale. Also, there should not be any other values such as 5,6,7 marked on the axis. So I tried the following x =

For those who are interested, I have made available a R function for noncentral hypergeometric distribution at http://www.geocities.com/jg_liao/software/Hypergeometric/hypergeometric_in_R.txt The paper that describes the algorithm will appear in The American Statistician. The function does not run on S-plus as the R's scoping rule is used. Here is how the function can be used: > n1 <- 100 > n2 <- 100 > m1 <-...

...as part of a variable name 2. Uses C or Java style comments mark. Jason ===== 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 __________________________________________________ HotJobs - Search new jobs daily now -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un...

...arc these days. But our department has a (pretty new) two-CPU Sun server. We recently compiled R as a 64 bit application and expected a performance boost. But it runs 25-30% slower than the 32 bit version of R. Anyone knows why this is so? Thanks! Jason ===== Jason Liao, http://www.geocities.com/jg_liao Dept. of Biostatistics, http://www2.umdnj.edu/bmtrxweb University of Medicine and Dentistry of New Jersey phone 732-235-5429, School of Public Health office phone 732-235-8611, Cancer Institute of New Jersey office moble phone 908-720-4205 ______________________________________________ R-help@stat...

...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___...

...(), which apply to a vector, not the 10000*3 array in my problem. Thanks in advance. Jason ===== Jason G. Liao, Ph.D. Division of Biometrics UMDNJ School of Public Health 335 George Street, Suite 2200 New Brunswick, NJ 08903-2688 phone (732) 235-9748, fax (732) 235-9777 http://www.geocities.com/jg_liao __________________________________________________ -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "bod...

...few Office applications that are always running claim at least 100MB RAM according to the performanc monitor; that doesn't leave much for the large objects you tend to create when you vectorize unless you have at least 256MB. Reid Huntsinger -----Original Message----- From: Jason Liao [mailto:jg_liao at yahoo.com] Sent: Monday, April 16, 2001 11:14 PM To: r-help at stat.math.ethz.ch; jg_liao at yahoo.com Cc: Jason Liao Subject: [R] fastest R platform: follow-up and summary First, I would like to thank everyone who responded to my post and I apol*o*gize for replying late. 1. How slow can R be...

...he future? Thanks. By the way, the OS is Windows XP home edtion. Jason ===== 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

...nd of operation million of times and I appreciate your input. Thanks. Jason Liao ===== Jason G. Liao Department of Biometry and Epidemiology Medical University of South Carolina 135 Rutledge Ave., STE 1148, Charleston, SC 29425 phone (843) 876-1114, fax (843) 876-1126 http://www.geocities.com/jg_liao/index.html __________________________________________________ Do You Yahoo!? Get email alerts & NEW webcam video instant messaging with Yahoo! Messenger http://im.yahoo.com -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci...

...longer find some key functions called within it. I understand this has something to do with searching path which I do not understand well. Can anyone tell me how to modify the source code of an R function and still make it part of an existing package? Thanks. Jason Liao, http://www.geocities.com/jg_liao Associate Professor of Biostatistics Drexel University School of Public Health 245 N. 15th Street, Mail Stop 660 Philadelphia, PA 19102-1192 phone 215-762-3934

...longer find some key functions called within it. I understand this has something to do with searching path which I do not understand well. Can anyone tell me how to modify the source code of an R function and still make it part of an existing package? Thanks. Jason Liao, http://www.geocities.com/jg_liao Associate Professor of Biostatistics Drexel University School of Public Health 245 N. 15th Street, Mail Stop 660 Philadelphia, PA 19102-1192 phone 215-762-3934

...double value = 0., diff; for (int i=0; i<bBox[0].length;i++) { diff = (bBox[1][i] - bBox[0][i])/2.; value += diff*diff; } return Math.sqrt(value); } } ===== Jason Liao, http://www.geocities.com/jg_liao Dept. of Biostatistics, http://www2.umdnj.edu/bmtrxweb University of Medicine and Dentistry of New Jersey phone 732-235-5429, School of Public Health office phone 732-235-8611, Cancer Institute of New Jersey office moble phone 908-720-4205

...in 1:10) test2() print(date()); for(i in 1:10) test3() print(date()); ===== Jason G. Liao Department of Biometry and Epidemiology Medical University of South Carolina 135 Rutledge Ave., STE 1148, Charleston, SC 29425 phone (843) 876-1114, fax (843) 876-1126 http://www.geocities.com/jg_liao/index.html __________________________________________________ Do You Yahoo!? Yahoo! Auctions - buy the things you want at great prices http://auctions.yahoo.com/ -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~...