[R] Stratified data summaries

[David Freedman]

You might also want to look at the doBy package - one function is summaryBy:

summaryBY(var1 + var2 ~ patient_type, data=d, FUN=summary)

david freedman

Hayes, Rachel M wrote:
> 
> Hi All,
> 
>  
> 
> I'm trying to automate a data summary using summary or describe from the
> HMisc package.  I want to stratify my data set by patient_type.  I was
> hoping to do something like:
> 
>  
> 
> Describe(myDataFrame ~ patient_type)
> 
>  
> 
> I can create data subsets and run the describe function one at a time,
> but there's got to be a better way.  Any suggestions?
> 
>  
> 
> Rachel
> 
> 
> 	[[alternative HTML version deleted]]
> 
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