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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 Profe...

...>>>>>>> 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 >>&g...