Returns an Age-Length Key calculated from a matrix with the
count of individuals per age- and length-class, as
described by Fridriksson (1934).
Usage
calc_ALK(x)
Arguments
x
A matrix with i lines and j
columns, where x[i, j] is the count of individuals
of length i and age j.
Value
A matrix with the probability of an individual of length
i having age j, i.e. $P(j|i)$.
References
Fridriksson, A (1934). On the calculation of
age-distribution within a stock of cod by means of
relatively few age determinations as a key to measurements
on a large scale. Rapp. P.-V. CIEM, 86,
1-5.