Hello. > in Blas, the method DAXPY can lead to very compact code. As far as I know, it > has no equivalent in RealVector. There are a few method called xxxxToSelf, > which modify the calling vector, instead of returning a new one, but these are > restricted to scalars operating on vectors. > In other words, there are no in-place vector-vector operations. > Would you think it useful to add at least one method, say > combineToSelf(double s, double t, RealVector v) > which would replace the components of this by the components of (s * this + t > * v). This would be a slight generalization of DAXPY.
You should open an issue on JIRA to keep track of this feature request. [Not sure about the "combineToSelf" name: "combine" is used in "FunctionUtils" but not exactly with the same meaning...] > It would be fairly easy to implement for ArrayRealVector, not sure about > OpenMapRealVector. A default implementation would be implemented in "AbstractRealVector", (where a "SparseEntryIterator" is defined and the method "mapToSelf" is an example of how it is used). Thanks, Gilles --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
