search for: harrel

Dear list, I am relatively new to ordinal models and have been working through the example given by Frank Harrell in the predict.lrm {Design} help All of this makes sense to me, except for the responses, i,e how do i interpret them? i would be extremely grateful if someone could explain the results? First i establish the date and model - > y <- factor(sample(1:3, 400, TRUE), 1:3, c('good',&...

Hi everybody. I'm studying the Harrell's book on regression modeling strategies, and I'd like to replicate the examples using R (instead of S+). So how's going the porting of the hmisc and design libraries? Are there available, though in beta version? TIA, Stefano Calza -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-...

Has anyone tried to download Hmisc and used ldBands function for calculating Lan-Demets group sequential boundaries? The write-up in F.Harrell's website indicates that, besides downloading the package Hmisc, one needs to copy the progra ld98 from the University of Wisconsin website. As suggested, I did this but received another error message regarding the search path. I think I have fixed this problem. But, when I tried to run the...

In Henric's recent post, he included this output: @BOOK{R:Harrell:2001, AUTHOR = {Frank E. Harrell}, TITLE = {Regression Modeling Strategies, with Applications to Linear Models, Survival Analysis and Logistic Regression}, PUBLISHER = {Springer}, YEAR = 2001, NOTE = {ISBN 0-387-95232-2}, URL = {http://biostat.mc.van...

Dr. Frank E. Harrell, Jr., Professor and Chair of the Department of Biostatistics at Vanderbilt University is giving a one-day workshop on Regression Modeling Strategies on Friday, April 29, 2005. Analyses of the example datasets use R/S-Plus and make extensive use of the Hmisc library written by Professor Harrel...

Does anyone have a valid email address for Frank Harrell of Hmisc fame? I've tried getting in touch with him at both fharrell at virginia.edu and f.harrell at vanderbilt.edu, but messages to either of those addresses get bounced. Frank, if you're reading this, please email me from an account that will accept a reply. Jeff Hallman

Dear All, Is it possible to get confidence intervals for Harrell's concordance index or, equivalently, Somer's D using the rms package or in some other way ? I have survival data it would be the c-index in the Cox model setting Many thanks Dr Bernard North Statistical Consultant Statistical Advisory Service Advice and Courses on Research Design and...

Does anyone know of an R function for computing the Greenland-Robins variance for Mantel-Haenszel relative risks? Thanks Frank -- Frank E Harrell Jr Professor and Chair School of Medicine Department of Biostatistics Vanderbilt University

Frank (or anyone else), can you offer any comments comparing runjags, R2jags, rjags ? I couldn't find any vignettes, nothing except a brief mention on Task Views. Kevin On Wed, Oct 7, 2009 at 7:48 AM, Frank E Harrell Jr <f.harrell@vanderbilt.edu > wrote: > Have you tried the rjags package which uses the jags system? It is much > more integrated into R and works quite well. It uses the same modeling > language as BUGS. It is also better supported than OpenBUGS. > > Frank > > Bill...

I would vote for allowing a URL or external file name in in DESCRIPTION, whose contents could be automatically displayed for the user when needed. Our changelogs are automatically generated by CVS and are on the web. -- Frank E Harrell Jr Professor and Chair School of Medicine Department of Biostatistics Vanderbilt University

I'm looking for design and hmisc version 2.0 for R 1.8 for windows. I've found design 2.0 in the downloads for R1.7 but not hmisc. I've also checked Dr. Harrell's site and it only goes to 1.6 for windows. Any thoughts? Shawn Way

...randomly chosen time series in each panel and want to add (n=100) in the bottom strip to indicate the 3 curves were sampled from 100. Is there a not-too-hard way to do that? I would like to do this both with and without groups= and superposition, but especially with. Thanks Frank -- Frank E Harrell Jr Professor and Chair School of Medicine Department of Biostatistics Vanderbilt University

...interpretation for this? This problem is very critical to me because the Design package is the only one I can use for my purpose. Any advice is greatly appreciated. Best regards, Vikki -- View this message in context: http://r.789695.n4.nabble.com/Interpreting-the-example-given-by-Prof-Frank-Harrell-in-Design-validate-cph-tp3316820p3316820.html Sent from the R help mailing list archive at Nabble.com.

Dear R Users, I have three questions. 1) Is there a way to get the output tex file to include \documentclass{report} \begin{document} and \end{document} so I can generate a PDF straight away. (I am trying to generate hundreds of these and don't want to have to manually type this in every time I load a tex file). 2) When I have have a table of greater than 9 columns, the columns to

...e here http://www.decisionstats.com/2009/02/interview-phil-rack/ On Tue, Mar 3, 2009 at 8:53 PM, Ajay ohri <ohri2007@gmail.com> wrote: > > why didnt you call it procunivariate if that was exactly what you wanted to > do ..... > > > On Tue, Mar 3, 2009 at 7:11 PM, Frank E Harrell Jr < > f.harrell@vanderbilt.edu> wrote: > >> Ajay ohri wrote: >> >>> for an " inefficient " language , it sure has dominated the predictive >>> analytics world for 3 plus decades. >>> I referred once to intellectual jealousy between newt...

...htm . The PSSASP3.SAS program is a prime example. Look at how you do a vector product in the SAS macro language to evaluate predictions from a logistic regression model. I estimate that using R would easily cut the programming time of this set of programs by a factor of 4. Frank -- Frank E Harrell Jr Professor and Chair School of Medicine Department of Biostatistics Vanderbilt University

Dear listserve members, especially Prof. Harrell: I am trying to create a factor variable that has fewer levels than the original. I have a factor: >rosa$risk1 [1] 2 2 5 1 ... [1799] 3 3 1 3 1 6 3 3 1 5 3 5 3 3 3 0 3 3 3 1 1 3 Levels: 0 1 2 3 4 5 6 8 But when I do this: rosa2 <- upData(rosa, levels=list(risk1=list(1='1',2=&...

2011 Regression Modeling Strategies Short Course by Frank E. Harrell, Jr., Ph.D., Professor and Chair, Department of Biostatistics, Vanderbilt University School of Medicine. 2011 Dates: Wednesday, March 9 (8:00AM-11:00AM), Thursday, March 10 (8:00AM-4:00PM) and Friday, March 11, 2011 (8:00AM-4:00PM). Location: Vanderbilt Campus; Sarratt Student Center (SARR) 216/...

...ow of a solution? I'm assuming that Hadley doesn't want to export these functions or he would have done so a long time ago because of the number of users who have asked questions related to this. Frank -- ------------------------------------------------------------------------ Frank E Harrell Jr Professor and Chairman School of Medicine Department of *Biostatistics* *Vanderbilt University* [[alternative HTML version deleted]]

Hello, I am trying to use HMisc describe on a data frame. I have specified certain variables as dates using, for example: df1$aidsdate <- dates(aidsdate,format="day.mon.year", origin=c(month = 1, day = 1, year = 1960)) When I use describe on the dataframe I get this error: Error in Ops.dates(weights, x) : * not defined for chron objects Has anyone had this problem? I had