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mr_k
2003 Jul 18
3
Problem indexing into array
...as k rows (one for each Xi) of 8 numbers
M: N x (3+k) matrix of cases. The first 3 cols are values
of (F1,F2,F3) as above (and the remainder are values
of (X1,...,Xk) but this doesn't really matter).
AIM: For each row of M, find from mu the set of k means
mu_1,...,mu_k corresponding to the values of F1, F2, F3
in that row. E.g. if M[1,1:3] -> 2,1,1 I want mu[,2,1,1]
BUT: Not to have to do it by mu[,M[1,1],M[1,2],M[1,3]] but more
like mu[,M[1,1:3]] -- except that this kind of try does not
work, leading to error: "incorrect number of dimensions...