2012/1/12 Ted Dunning <ted.dunn...@gmail.com>: > One such example is a text retrieval engine. A x is easy since that is > what the engine does. A' y is very expensive. > > 2012/1/12 Sébastien Brisard <sebastien.bris...@m4x.org> > >> In other words, I do not know how to access >> efficiently the (i, j) coefficient, but I *do* know how to compute >> efficiently A.x. There might be some cases where computing A'.x would >> still be difficult. I do not have an example here, but that's the >> reason why initially >> RealVector operateTranspose(RealVector) >> was not put in the RealLinearOperator abstract class. >>
Thanks for this example! So you *do* agree that implementing operateTranspose() should be optional, don't you? Sébastien --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
