[R] Merging data XXXX

[David Winsemius]

On Jan 13, 2012, at 1:42 PM, Dan Abner wrote:

> Hello everyone,
>
> I have 1 data frame (just a vector in the example below) with 12
> individuals listed and a separate vector of 36 days (in week  
> intervals).
> What is the best way to merge these together so that each individual
> ("specialist" here) has all 36 days matched with their specialist  
> number (a
> one to many merge in SAS; essentially resulting in long format data).
>
> implement<-as.Date("2012-4-30")
> start<-implement-91
> weeks<-seq(start,by="weeks",length=36)
> weeks
> specialist<-1:12

?rep
?data.frame

I would not think 'merge' is needed ... you just want to make the  
right number of copies and you should be paying attention to the  
'each' and 'times' parameters.

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-- 

David Winsemius, MD
West Hartford, CT