Hi,
Is it what you're looking for?
which(y>4) ##all indexes for y>4
[1] 3 6 7 9 11
which(y>4)[1] ##the first index
[1] 3
HTH,
Ivan
--
Ivan CALANDRA
Université de Bourgogne
UMR CNRS/uB 6282 Biogéosciences
6 Boulevard Gabriel
21000 Dijon, FRANCE
+33(0)3.80.39.63.06
ivan.calan...@u-bourgogne.fr
http://biogeosciences.u-bourgogne.fr/calandra
Le 23/10/12 11:21, Al Ehan a écrit :
Hi,
I got a small problem on how to define the vector index without manually
inspect the vector.
example:
y=c(2,3,5,2,4,6,8,3,6,2,5) #I have ten set of this kind of vectors (with
different values but same length) that I would also like to run the routine
below
#say;
v=the first index in y where the value is larger than 4, in this case index
3, value 5
#what I would like to do is take y[1:v] and run it to some function
#hence I should also get y[(v+1),length(y)] and can run to other function
as well..
I know this is easy peasy for you..please help, many thanks.
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