I would like to perform a bootstrap validation of a backward stepwise
logistic regression analysis, but I am a beginner with R and I am not
sure of how to do it.
Is there anyone that can send me a sample file in tab format (that I
can modify in Excel by pasting my data) and the pertinent R algorithm?
Many thanks
Giuseppe
You are asking for a lot and not saying that you are willing to read background material or help files.
To get you started, install the Design and Hmisc packages and look at help files for the following in Design: fastbw, lrm, validate.lrm, calibrate.lrm
Frank
--
Frank E Harrell Jr Professor and Chair School of Medicine
Department of Biostatistics Vanderbilt University______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
