[R] transitions in R
Greg Trafton
trafton at itd.nrl.navy.mil
Mon Jul 9 21:57:41 CEST 2001
Hi, All. I'd have a set of data in an array:
process <- c( 5 , 7 , 4 , 1 , 4 , 1 , 4 , 1 , 4 , 4 , 1 , 5 , 4 , ...)
and I'd like to know the number of transitions in this data. I
calculate transitions as the number of times a number follows another
number. thus, something like this would be a 1 deep transition:
1 --> 1 : 10% (and actual number of 1 --> 1 occurrences)
1 --> 2 : 2%
1 --> 3 : 23%
...
2 --> 1 : 2%
2 --> 2 : 8%
(etc.)
of course, you can have 2 or 3 or n deep transitions, but I'm really
only interested in 1 and 2 (and maybe 3) deep transitions.
what is the best way of calculating this info in R?
thanks!
greg
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