Sometimes for the sake of simplicity, SAS coding is created like that. One
can use the concatenate function and drag and drop in an simple excel sheet
for creating elaborate SAS code like the one mentioned and without any time
at all.
There are multiple ways to do this in SAS , much better and similarly in
R....

There are many areas that SAS programmers would find R a bit not so useful
---example

the equivalence of proc logistic for creating a logistic model.



On Fri, Feb 27, 2009 at 10:21 AM, Wensui Liu <liuwensui@gmail.com> wrote:

> Thanks for pointing me to the SAS code, Dr Harrell
> After reading codes, I have to say that the inefficiency is not
> related to SAS language itself but the SAS programmer. An experienced
> SAS programmer won't use much of hard-coding, very adhoc and difficult
> to maintain.
> I agree with you that in the SAS code, it is a little too much to
> evaluate predictions. such complex data step actually can be replaced
> by simpler iml code.
>
> On Thu, Feb 26, 2009 at 5:57 PM, Frank E Harrell Jr
> <f.harrell@vanderbilt.edu> wrote:
> > If anyone wants to see a prime example of how inefficient it is to
> program
> > in SAS, take a look at the SAS programs provided by the US Agency for
> > Healthcare Research and Quality for risk adjusting and reporting for
> > hospital outcomes at http://www.qualityindicators.ahrq.gov/software.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
> >
> > ______________________________________________
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> > PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
> >
>
>
>
> --
> ===============================
> WenSui Liu
> Acquisition Risk, Chase
> Blog   : statcompute.spaces.live.com
>
> I can calculate the motion of heavenly bodies, but not the madness of
> people.”
> --  Isaac Newton
> ===============================
>
> ______________________________________________
> R-help@r-project.org mailing list
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> PLEASE do read the posting guide
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>

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