2011/8/25 Sébastien Brisard <sebastien.bris...@m4x.org> > Hi Ted, > > > > > You missed my suggestion. > > > are you referring to the thread named "New method: "addToEntry" in > "RealVector""? > If yes, I initially thought that what you suggested was pretty similar > to the Visitor approach. > Thanks to the above message, I now understand that your suggestion is > the Visitor approach PLUS the ability to provide different "views" of > the same matrix/vector. > Is that correct?
Yes. Views are critical to the suggestion because they control where the visitor goes. Allowing more general visitors than a pure element function is probably a great idea. It is not uncommon to need the indexes of the element. > Should I dive into Mahout to understand more on this topic? > Your choice. Here is some (very) recent code that makes use of these capabilities: https://github.com/tdunning/mahout/blob/new-stochastic/math/src/main/java/org/apache/mahout/math/CholeskyDecomposition.java https://github.com/tdunning/mahout/blob/new-stochastic/math/src/main/java/org/apache/mahout/math/ssvd/SequentialBigSvd.java
