2012/1/12 Ted Dunning <[email protected]>: > 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 <[email protected]> > >> 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: [email protected] For additional commands, e-mail: [email protected]
