Search Archives

Thanks Peter. I think you're right. Frank ----- Frank Harrell Department of Biostatistics, Vanderbilt University -- View this message in context: http://r.789695.n4.nabble.com/predict-lrm-Design-package-tp2546894p2547146.html Sent from the R help mailing list archive...

We have openings for biostatisticians at all levels: B.S., M.S., Assistant Professor, Associate Professor, and full Professor. Details are at http://biostat.mc.vanderbilt.edu/JobOpenings -- Frank E Harrell Jr Professor and Chair School of Medicine Department of...

One statistic that might be worth collecting is the number of unique IP addresses that request update.packages( ) or install.packages( ) on CRAN or one of its mirrors. Frank Harrell --- Frank E Harrell Jr Professor and Chair School of Medicine...

Can someone point me to R code or recent publications dealing with selection of representative time-response profiles in longitudinal data from datasets containing a large number of subject's profiles? Thanks Frank -- Frank E Harrell Jr Professor and Chair...

It all depends on the ultimate use of the results. Frank ----- Frank Harrell Department of Biostatistics, Vanderbilt University -- View this message in context: http://r.789695.n4.nabble.com/Validation-Training-test-data-tp2718523p2719370.html Sent from the R help...

Has anyone written R code for importing financial QIF files? I know there is an OpenOffice plugin for importing these into a spreadsheet but I found that it omits some records. Thanks, Frank -- Frank E Harrell Jr Professor and Chair...

It's implemented in the R rms package's lrm and orm functions. ----- Frank Harrell Department of Biostatistics, Vanderbilt University -- View this message in context: http://r.789695.n4.nabble.com/Nagelkerke-Pseudo-R-squared-tp4710014p4710031.html Sent from the...

DrakeGis wrote: > Thanks for the help. > -I'm really sorry, but I'm affraid I can't publish any data in order to > allow a reproduction of the results (enterprise policies :( ). That is silly. You can surely simulate data that...

Marten Winter wrote: Now that's a brief note. mApply in the Hmisc package may have large speed advantages over by for large datasets. Also look at the summarize function in Hmisc, which uses mApply. -- Frank E Harrell Jr Professor...

Whoops - thought I was replying to google medstats instead of r-help. Frank ----- Frank Harrell Department of Biostatistics, Vanderbilt University -- View this message in context: http://r.789695.n4.nabble.com/Reading-sas7bdat-files-into-R-tp3165608p3166047.html Sent from...

Is the (non-clustered) sandwich estimator really robust to autocorrelation? Thanks Frank ----- Frank Harrell Department of Biostatistics, Vanderbilt University -- View this message in context: http://r.789695.n4.nabble.com/robust-standard-error-of-an-estimator-tp3170257p3170363.html Sent from...

I made the mistake of updating to Ubuntu 20.10 from 20.04 before before debian repo supports 20.10.? This broke RcppParallel and plotly.? Any idea with 20.10 will be available for r-cran-* debian packages? Thanks Frank...

For all those useRs who didn't make it to Dortmund Germany for useR! 2008 you missed a great conference. Hats off to Uwe Ligges and the other organizers and assistants who planned and executed the meeting superbly. Frank -- Frank...

Jing Yang wrote: > Dear R-users, > > Does anyone have an idea of how to calculate the quantile of the weighted data? > Any suggestion will be appreciated! > > Best,Jing library(Hmisc) ?wtd.quantile -- Frank E Harrell Jr Professor and Chair School...

sj wrote: > I have a set of values and their corresponding weights. I can use the > function weighted.mean to calculate the weighted mean, I would like to be > able to similarly calculate the weighted median and quantiles? Is there...

Beware that causality can only be inferred using information that extends far beyond the data at hand. Frank ----- Frank Harrell Department of Biostatistics, Vanderbilt University -- View this message in context: http://r.789695.n4.nabble.com/Multivariate-Granger-Causality-Tests...

Thanks very much David and Bert. That did it. Frank ----- Frank Harrell Department of Biostatistics, Vanderbilt University -- View this message in context: http://r.789695.n4.nabble.com/Syntax-for-lattice-scales-argument-with-a-b-tp3560973p3561131.html Sent from...

Gabor Grothendieck wrote: > Convert dat to a matrix and see if working with the > matrix instead of a data frame speeds things up > enough. In the Hmisc package the asNumericMatrix and matrix2dataFrame functions facilite this. Also look at the summarize...

Many moons ago I reported to r-bugs some easy to fix errors in ace and avas. I wonder if someone would mind making those corrections. Thanks very much, Frank --- Frank E Harrell Jr Prof. of Biostatistics & Statistics Div. of...

Use the rms package, a replacement for of Design Frank ----- Frank Harrell Department of Biostatistics, Vanderbilt University -- View this message in context: http://r.789695.n4.nabble.com/Plotting-number-of-patients-at-risk-below-survival-curve-tp3048900p3050315.html Sent...