There is both a technical and a theoretical element to my question... Should I be able to use the outputs which arise from the fastbw function as inputs to nomogram(). I seem to be failing at this, -- I obtain a subscript out of range error. That I can't do this may speak to technical failings, but I suspect it is because Prof Harrell thinks/knows it injudicious. However, I can't invent a reason why nomograms should be restricted to the full models, if the purpose of fastbw is to generate parsimonious models with appropriate standard errors. I'd welcome comments on either the technical or the theoretical issues. Many thanks in advance, Rob James
Nomograms from rms' fastbw output objects
2 messages · Rob James, Frank E Harrell Jr
Hi Rob, fastbw does not try to produce a full fit object. You have to re-run the fit manually based on what you (sometimes dangerously) learn from fastbw. If I can find a way to add a 'formula' component to the fastbw result then you could do something like lrm(fastbw(fit)$formula, ...). Frank
Rob James wrote:
There is both a technical and a theoretical element to my question... Should I be able to use the outputs which arise from the fastbw function as inputs to nomogram(). I seem to be failing at this, -- I obtain a subscript out of range error. That I can't do this may speak to technical failings, but I suspect it is because Prof Harrell thinks/knows it injudicious. However, I can't invent a reason why nomograms should be restricted to the full models, if the purpose of fastbw is to generate parsimonious models with appropriate standard errors. I'd welcome comments on either the technical or the theoretical issues. Many thanks in advance, Rob James
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----- Frank Harrell Department of Biostatistics, Vanderbilt University -- View this message in context: http://r.789695.n4.nabble.com/Nomograms-from-rms-fastbw-output-objects-tp3482669p3483607.html Sent from the R help mailing list archive at Nabble.com.