Questions

1. Code uses forget factor of 1.5. Why? (It should be in (0,1].
2. sklm() expects U0 to be of a centered matrix. But initial mapping Ps is computed with SVD of **non-centered** data Xs. Why?
3. In the paper Wsa = U\*U\'\*P\*P\'. But in the code it **doesn't use** U. Why?

I tried to change these, but the result is worse than the paper.
