Hi,
I am looking for an implementation of the fused lasso that allows the
predictor matrix to be an "abstract" linear operator, namely the cumulative
sum (that is, (X.b)_i = sum(b_k, k=1..i)) (due to the size of the problem,
forming the entire matrix is unlikely to be a good approach). Any pointers
would be welcome.
Thanks!
Antony
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