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lebar
2004 Jul 29
3
Help w/ matrix calc
Dear All,
Help is needed! I have a matrix with frequencies of fish larvae per length
class (var. sl) and age-group (var. median.no) obtained with
>k<-table(cut(sl,(5:22)),median.no)
>k[2:5,1:5] #to ilustrate k
4 5 6 7
(6,7] 3 1 0 0
(7,8] 3 0 1 0
(8,9] 3 4 3 5
(9,10] 3 15 7 13
from this matrix I would like to obtain the mean age per length class i.e.