I still think it is a good idea. Sent from my iPhone
On Nov 22, 2011, at 23:27, Sébastien Brisard <sebastien.bris...@m4x.org> wrote: > Hello, > I would like to revive a discussion which took place a few months ago, > about the design of the matrix and vector classes. As far as I remember, > what came out was that these classes would benefit from a more functional > approach, à la Mahout. Additionally, I think Ted suggested that we > introduce Views of a given matrix. I know we should be careful not to be > too quick, but I think we should give it a go. During our discussions, it > came out that RealVector and RealMatrix had useful embryos of functional > features > - RealVector.map(UnivariateRealFunction f) > - RealMatrix.walkXxx(visitor) > these features are somewhat similar, except for the fact that > RealVector.map never sees the index of the current cell. > A first step might be to unify these two interfaces > - Implement visitors for RealVector, > - possibly add a map(UnivariateRealFunction f) to Matrix. > As a second (big step), we could try and clean up the interfaces for > Vectors and Matrices, defining as many Visitors as possible, instead of > cluttering the corresponding interfaces (keeping, of course, performance > issues in mind). > > What do you think? Should we give it a go? At this point, people already > suggested that this should be done in a branch? > > Best regards for now, > Sébastien --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
