Hi,
I need help writing a function
I capture seal pups mutliple times during the lactation season in order to
monitor their growth rate. When I release them, the recovery (mother-pup)
time is not the same for all individuals. I want to know if individuals that
recover their mother the fastest are the ones with the highest growth rates.
So, I noted at every release if the pup reovered his mother before we leave
(yes or no). My dataframe looks like this
Capture nb individual individual capture motherrecovery growth rate
1 1 1 n 0.5
2 1 2 y 0.5
3 1 3 y 0.5
4 1 4 y 0.5
5 1 5 n 0.5
6 2 1 y 0.3
7 2 2 y 0.3
8 3 1 y 0.4
9 3 2 n 0.4
10 3 3 y 0.4
...
I want to calculate a rate of mother recovery by individual, i.e. nb of
recoveries (y)/nb of captures. So for indivial 1 it would be 3/5 = 0.6. I
want to write a function that does this for all the individuals in my
dataframe, i.e. around 400 individuals (this is why I want to write a
function, it would be too long by hand)
Thank you,
Joanie Van de Walle
??tudiante ?? la Ma??trise en Biologie
D??partement de Biologie
1045, avenue de la M??decine Pavillon Vachon,
bureau 2044 Universit?? Laval
Qu??bec, Canada, G1V 0A6