Dear S-plus users
I use Splus 4.5 and have some questions about the ace() function:
1. As part of the algorithm ace() must have something like gam().
In gam() one can use the function s() or l() which usually must be
supplied by smoothing parameters. Nothing like that appears in ace().
What are the defaults?
2. If I have understood right when one uses the option of many
eigen solutions the solutions have to be ordered by the rsq values.
In reality it is not always so, sometimes low rsq values appears
before much higher rsq values. Is it a numerical computation problem?
3. There are to steps in each iteration of the algorithm. If one
wants to use weights in my view there must be two sets of weights,
one for each step, Yet one can supply only one set of weights (wt=...),
how this set of weights is incorporated into the algorithm?
4. In general I have found the help of the software for ace() far from
being enough. Where I can find more information about the ace()
implementation (not on the theory of ace()).
Thank you for your help.
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