search for: mccullough

Folks: I thought the following excerpt from Bruce McCullough's post would be a good candidate for the R fortunes package -- except that it's about Excel, not R! So I nominate it... but leave it to others to say whether it's really "qualified" to be nominated. ---- "The idea that the Excel solver "has a good reputation for be...

...the Excel solver's ability to solve the StRD nls test problems. Solver's ability is abysmal. 13 of 27 "answers" have zero accurate digits, and three more have fewer than two accurate digits -- and this is after tuning the solver to get a good answer. For details see B. D. McCullough and Berry Wilson "On the Accuracy of Statistical Procedures in Microsoft Excel 2000 and Excel XP," /Computational Statistics and Data Analysis/ *40*(4), 713-721, 2002 The situation is the same for Excel 2003 and Excel 2007. The alleged "improvements" for Excel 2010 have had...

...blic. I have also tried scp and ftp using /media/public, and they both work fine, so it doesn't seem like a common case of poor permission settings. Has anyone else ever experienced this or know of a possible cause? I'm running Fedora Core 4 if that helps. Thanks in advance, Justin McCullough

Dear All, A couple of questions about the nls package. 1. I'm trying to run a nonlinear least squares regression but the routine gives me the following error message: step factor 0.000488281 reduced below `minFactor' of 0.000976563 even though I previously wrote the following command: nls.control(minFactor = 1/4096), which should set the minFactor to a lower level than the default

...;http://www.stat.uni-muenchen.de/~knuesel/elv/accuracy.html > > > > > >In addition, there are additional references on Excel > specifically: > > > > > >On the accuracy of statistical procedures in Microsoft > Excel 2000 and > >Excel XP > >B.D. McCullough and B. Wilson, (2002), Computational > Statistics & Data > >Analysis, 40, pp 713 - 721 > >http://www.elsevier.com/gej- > ng/10/15/38/85/51/28/abstract.html > > > > > >On the accuracy of statistical procedures in Microsoft > Excel ???97 > >B.D. McCu...

...dvocating such use, these discussions have referenced articles that provide independent reviews of these applications and issues of accuracy, etc. Based upon a posting to Linux Today (http://linuxtoday.com/news/2004022600226OSBZGN), I became aware this evening of a new paper by the well known B.D. McCullough, who has published many such reviews of both spreadsheets and other statistical applications. In the latest paper (pdf available from http://www.csdassn.org/software_reports.html), Prof. McCullough reviews Gnumeric as an example of how an open source project has responded to prior criticism of iss...

Do you know of any references that verify the accuracy of R for basic statistical calculations and tests. The results of these studies should indicate that R results are the same as the results of other statistical packages to a certain number of decimal places on some benchmark calculations. Thanks, Corey Powell Clinical Data Analyst Broncus Technologies cpowell@broncus.com [[alternative

I am one of only 5 or 6 people in my organization making the effort to include R/Splus as an analysis tool in everyday work - the rest of my colleagues use SAS exclusively. Today, one of them made the assertion that he believes the numerical algorithms in SAS are superior to those in Splus and R -- ie, optimization routines are faster in SAS, the SAS Institute has teams of excellent numerical

Does anybory knows any work comparing R with other (charged) statistical softwares (like Minitab, SPSS, SAS)? I work in a brasilian government bureau and I intend to use R as our preferable statistical software, but I have to show it's as good as the others. I also intend to use Weka, and for this one I have the same problem. Can anyone help me? Thanks René M. Raupp e-mail: rener@mpdft.gov.br

...ns to the derivative table in R? Please reply to me. I will post a summary to the list. Bruce PS: I believe that in R I should delete the "log" and instead use the "log.p=T" option; presumably it is numerically more efficient. If this is incorrect, please let me know. B. D. McCullough bdmccullough at drexel.edu www.pages.drexel.edu/~bdm25 w: 215-895-2134 f: 215-895-2907 Associate Professor Department of Decision Sciences Academic Building room 230 Drexel University...

...North Carolina 28516 http://shrimp.ccfhrb.noaa.gov/~mprager/ DISCLAIMER: Opinions expressed are personal, not official. No government endorsement of any commercial product is made or implied. --------------------------- Although they are out of date, there are some comparisons of accuracy in McCullough, B. D. (1998), "Assessing the reliability of statistical software: Part I", The American Statistician, 52, 358-366. McCullough, B. D. (1999), "Assessing the reliability of statistical software: Part II", The American Statistician, 53, 149-159. Regarding PROC NLMIXED versus...

Forwarded message: >From BMCCULLO at fcc.gov Fri Nov 6 12:50:07 1998 Message-Id: <s642efa3.006 at fcc.gov> X-Mailer: Novell GroupWise 4.1 Date: Fri, 06 Nov 1998 12:51:24 -0500 From: Bruce McCullough <BMCCULLO at fcc.gov> To: mai at ms.uky.edu Subject: S-Plus RNG Mime-Version: 1.0 Content-Type: text/plain Content-Disposition: inline Mai, Someone forwarded to me your e-mail about RNGs. I do not know about S-Plus 4.5, but S-Plus 4.0 RNG was bad. It failed many of Marsaglia's DIEHAR...

...nk at the bottom of the page. For reasons described in the R-RNGTests.txt, I could not test the Mersenne RNG. This will require someone with a better knowledge of the C language than I possess. If anyone can figure it out, I would be most grateful. Please reply directly to me. Regards, Bruce McCullough

Hello, I am fitting a gmler using poisson, and I was looking for a documentation to interpret correctly the output. I'm quite a beginner with these kind of models. I couldn't find something in the lme4 package manual. and on the internet neither... Thank you, Raphaelle -- View this message in context: http://www.nabble.com/glmer-documentation-tp21506036p21506036.html Sent from the R

Dear all, I was reading last night the lm and the Formula manual page, and 'I have to admit that I had tough time to understand their syntax. Is there a simpler guide for the dummies like me to start with? I would like to thank you in advance for your help Regards Alex [[alternative HTML version deleted]]

We are trying to use Ruby-ldap 0.9.4 with Ruby 1.84 on Rails 1.1.2. All is running on top of Solaris 2.8. The overall setup works fine for doing other things like access an Oracle DB, and displaying items. When it comes to using Ruby-ldap though, it is quite a different matter. We''ve tried using Ruby-ldap within irb, and all seems well. The basic scenario is: conn =

...ire enterprise. The client communicates with a Linux server (currently running RHEL 7.9, reporting OpenSSH_7.4p1, OpenSSL 1.0.2k-fips 26 Jan 2017) using a technique we call SSH Pass-Through and described in an article in ;login: (Secure Automated File Transfer, vol. 30, no. 4, August 2005, by Mark McCullough who was also the original author of the client). The technique is predicated on using a forced command, which we specify per key with the "command=" directive in the authorized_keys file. (The user ID we use performs several functions, so we cannot use ForceCommand in configuration.) In...

Hi All I have a really strange problem which I need some help with I will give you the background Samba 2.2.12 installed on Red Had Linux Advanced Server 2.1 Basically I have upgraded a client from a Windows 2003 TS box to a Windows 2008 R2 TS box. The 2003 box had approx 30 concurrent users logged on and could browse to samba no problems at any time. Once I installed the Windows 2008

H R-helpers, I am using the following code to make a dataframe from an Excel spreadsheet: library(RODBC) channel <- odbcConnectExcel("Spreadsheet.xls") Data <- sqlFetch(channel, "Tab1") odbcClose(channel) One column (several, actually) in the spreadsheet contains integers in its first few rows but later values in these columns contain a mixture of numbers, letters and

...ire enterprise. The client communicates with a Linux server (currently running RHEL 7.9, reporting OpenSSH_7.4p1, OpenSSL 1.0.2k-fips 26 Jan 2017) using a technique we call SSH Pass-Through and described in an article in ;login: (Secure Automated File Transfer, vol. 30, no. 4, August 2005, by Mark McCullough who was also the original author of the client). The technique is predicated on using a forced command, which we specify per key with the "command=" directive in the authorized_keys file. (The user ID we use performs several functions, so we cannot use ForceCommand in configuration.) In...