[R] Odp: identify time span in date vector

[Petr PIKAL]

Hi

Can you please be more specific? Based on this input, what do you want as 
a result?

> set.seed(111)
> dates = as.Date(sort(rnorm(10,3000,100)), origin = "2000-1-1")
> dates
 [1] "2007-08-01" "2007-10-21" "2007-12-08" "2007-12-15" "2008-01-29" 
"2008-02-14" "2008-02-16" "2008-03-01"
 [9] "2008-04-02" "2008-04-11"
>

Regards
Petr

> 
> Hello everyone,
> 
> i try to identify the first element of a date vector, for which the 
> following condition holds: at least 3 more dates within the next 365 
days,
> but at least one of these must be between 3-12 month later.
> 
> dates = as.Date(sort(rnorm(10,3000,100)), origin = "2000-1-1")
> 
> Has anyone an idea how to do this economically? I'll need to apply this 
to
> a large dataset with date vectors of various lengths and I can think 
only 
> of quite difficult algorithms :(
> 
> Any ideas would be appreciated,
> Felix
> 
> 
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