[R] Identifying sequences

[ONKELINX, Thierry]

Something like this?

a=1:10
b=20:30
c=40:50
x=c(a,b,c)
borders <- which(diff(x) != 1)
seqs <- data.frame(start = c(1, borders + 1), end = c(borders, length(x)))

Best regards,

Thierry

> -----Oorspronkelijk bericht-----
> Van: r-help-bounces op r-project.org [mailto:r-help-bounces op r-project.org]
> Namens christiaan pauw
> Verzonden: woensdag 1 juni 2011 12:27
> Aan: r-help op r-project.org
> Onderwerp: [R] Identifying sequences
> 
> Hallo Everybody
> 
> Consider the following vector
> 
> a=1:10
> b=20:30
> c=40:50
> x=c(a,b,c)
> 
> I need a function that can tell me that there are three set of continuos
> sequences and that the first is from 1:10, the second from 20:30 and the third
> from 40:50. In other words: a,b, and c.
> 
> regards
> Christiaan
> 
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