[R] fastbw question

[Frank E Harrell Jr]

Peter Flom wrote:
> Hello
> 
> I am running R 2.0.1 on Windows, I am attempting to use Frank Harrell's
> 'fastbw' function (from the Design library), but I get an error that the
> fit was not created with a Design library fitting function; yet when I
> go to the help for fastbw (and also look in Frank's book Regression
> Modeling Strategies) it appears that fastbw should work with a model
> created with lm.....
> 
> Relevant code
> <<<<<
> model.borrow.logols<- lm(logborrow~age + sex + racgp + yrseduc + 
>  needlchg + gallery  + totni + inject + poly(year.of.int,3)  + druginj
> + inj.years  + HTLV3)
> 
> fastbw(model.borrow.logols)

The error message was exactly correct.  lm is not a Design fitting 
function.  Try ols.  -Frank

> 
> 
> Thanks in advance
> 
> 
> Peter
> 
> Peter L. Flom, PhD
> Assistant Director, Statistics and Data Analysis Core
> Center for Drug Use and HIV Research
> National Development and Research Institutes
> 71 W. 23rd St
> www.peterflom.com
> New York, NY 10010
> (212) 845-4485 (voice)
> (917) 438-0894 (fax)
> 
> ______________________________________________
> R-help at 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
> 


-- 
Frank E Harrell Jr   Professor and Chair           School of Medicine
                      Department of Biostatistics   Vanderbilt University