Dear Krissie
I think you may be looking for the aggregate command.
Note that this is a plain text list so if you post in HTML we do not see
what you see. In this case we did not see any red numbers.
Michael
On 25/01/2021 13:57, krissievdh wrote:
Hi,
I have a dataset (d_vigi)with this kind of data:
behavior type duration(s) observation nr species
Non-vigilant 5 1 red deer
Vigilant 2 1 red deer
Vigilant 2 1 red deer
Non-vigilant 3 1 red deer
Vigilant 7 2 red deer
Vigilant 2 2 red deer
Non-vigilant 1 2 red deer
Unkown 2 2 red deer
Now I have to calculate the percentage of vigilant behavior spent per
observation.
So eventually I will need to end up with something like this:
Observation nr Species vigilant(s) total (s) percentage of vigilant (%)
1 red deer 4 12 33
2 red deer 9 12 75
Now I know how to calculate the total amount of seconds per observation.
But I don't know how I get to the total seconds of vigilant behavior per
observation (red numbers). If I could get there I will know how to
calculate the percentage.
I calculated the total duration per observation this way:
for(id in d_vigi$Obs.nr){
d_vigi$t.duration[d_vigi$Obs.nr==id]<-sum(d_vigi$'Duration.(s).x'[d_vigi$Obs.nr==id])
}
this does work and gives me the total (s) but i don't know how to get to
the sum of the seconds just for the vigilant per observation number. Is
there anyone who could help me?
Thanks,
Krissie
[[alternative HTML version deleted]]
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Michael
http://www.dewey.myzen.co.uk/home.html
______________________________________________
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