search for: magillb

Displaying 15 results from an estimated 15 matches for "magillb".

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2002 Feb 08
2
Managing Data
...error, but I am sure there are some better options. I want to avoid doing silly things like overwriting a local object by running a piece of example code that happens to have the same variable name! I looked in R-intro, but the information there is pretty basic. Any ideas? Thanks, Brett Magill magillb at usa.redcross.org Research and Program Development Health, Safety, and Community Services American National Red Cross -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info",...
2002 Feb 25
1
Managing Data [Summary]
...ign 'permanent' objects to a particular position in your search path (usually pos=2), then save all objects in that position with a call to g.data.save()." Brett A. Magill, Evaluation Associate Research and Product Development Health, Safety and Community Services American Red Cross magillb at usa.redcross.org -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r...
2001 Jul 12
2
R Applied Regression Text
Is this text publicized? I ran across it doing an internet search. I have never seen any reference to it and it is not on CRAN under documentation. http://www.stat.lsa.umich.edu/~faraway/book/ -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or
2002 Jan 17
1
Using S-Plus Documentation with R
...nces in any case, I am just trying to decide wich version I want to dowload for use with R. They docs are at: http://www.insightful.com/support/documentation.asp?DID=1 Brett A. Magill, Evaluation Associate Research and Program Development Health, Safety, and Community Services American Red Cross magillb at usa.redcross.org -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-h...
2008 Nov 12
1
Generating Data for Simulation
Are there any R packages that could be used to generate random data given a set of parameters? Or, if not a package, how would one generate such data? What I would like to do is simulate some sample data for a regression model given a set of population covariances and distribution parameters to be used in a MC simulation. Thanks for any tips. [[alternative HTML version deleted]]
2001 Mar 26
1
Item Analysis and Cronbach's Alpha (Code Attached)
A short function I wrote for the purpose of evaluating scales made up of a number of questionnaire items. It provides Cronbach's Alpha, both unstandardized and based on standardized items. It also provides item statistics which include item-total correlations (corrected) and item-removed alpha. Thought some of you might find it useful. I would also appreciate any programming tips or
2012 Jan 03
3
An R interface to Model Building
Hello all, To anyone who is interested, I'm trying to learn a bit more about developing applications in R with user interfaces. I've been playing around with gWidgets to develop a model building interface. I'd appreciate any comments, suggestions, or guidance on how to better structure my R code and organize the programming task. In addition, any suggestions for features and
2000 Sep 12
1
HLM in R
Does anyone know of code to conduct hierarchical (that is, multi-level) models using R. Beyond simply requiring a nested design, I want to model explicitly the covariance between levels as is done in such multi-level modeling software as HLM or MLwin and discussed in Goldestein (1999) available online at http://www.arnoldpublishers.com/support/goldstein.htm (a nice and free resource for anyone
2001 Jul 26
0
Multi-level Models with NLME
Hello, I have a question about setting up a multi-level model in NLME. I have the P&B book, but I am still having trouble specifying the model. I am using the most recent version of NLME on R 1.3.0. I was referred to NLME after a previous query on multi-level models. Yet, I think part of my confusion is that I do not have a mixed model as far as I can see. I have random effects nested
2002 Jan 02
0
Status of "Official" Win Binaries for 1.4.0
Hello Everyone, Just a note to inquire about the status of the "official" RWin release. I downloaded the binaries from CRAN using the link provided by Guido Masarotto <http://sirio.stat.unipd.it/RWin> soon after they appeared on CRAN. However, following R help, it seems that there are some problems with that compilation, particularly related to GRID and Lattice. Sure enough, I
2003 Oct 27
1
Rpy Import Error
I am trying to install Rpy to test it out as an R interface for a project that I am working on. However, I get the following error. Any clues as to what might be going on? I have alo tried RSPython, but I gave up due to errors. RSPython segfaults when started from R and gives an error message I can;t remember from python. Thanks, Brett >>> import rpy Traceback (most recent call
2005 Dec 14
0
SAS.xpt/STATA.dta, field descriptions, and dbWriteTable
Hello all, I have a large database (~100MB in 13 relational files) that made its way to me in two formats. The files were sent in both SAS xport and STATA, thanks, I am told, to stat-transfer. The two files, ostensibly, contain the same data, just in different formats. My goal: Move these files to MySQl without the help of SAS or STATA (which I do not have). The tools I am using are: 1.
2005 Dec 16
0
Need help for a statistical problem ("See the posting guide")
In response to a thread where a statistical question unrelated to R was asked, Uwe Ligges wrote: > PLEASE do read the posting guide! > http://www.R-project.org/posting-guide.html > > Please ask a local statistical consultant for help. > > Uwe Ligges Perhaps Uwe's admonition to "do read the posting guide" was just a knee jerk reaction to an unrecognized
2001 May 01
3
Factor Analysis
Thanks to Brian Ripley for the time and effort put into developing the factanal package for R. I have found it very useful. However, in trying to replicate some results from previous research, I have run into the need for a couple of extensions and was wondering if they might find their way into future implementations. 1. Though maximum likelihood estimates might be more rigorous and
2000 Jul 17
3
Code for Coefficent (Cronbach's) Alpha
Hi all, I am trying to teach myself to use and program R (How else do you do it? lol) Anyway, I wrote a piece of code to compute coefficent alpha for a scale. As I am neither a statistician nor a programmer, I wanted people's feedback. The code appears to work (Win 95 with R 1.0.1) and I have verified my result with SPSS and it was correct (much to my astonishment!). Nonetheless, I am