Sure, But have a look at TVectorD instead of TMatrixD: TMatrixD B =... TVectorD x = .... TVectorD y(x); y *= B; const Double_t val = x*y; > Hi, > > With TMatrix class, is it possible to compute the product x^T B x without > having to copy the x elements in memory to generate x^T? > > Thank you! > > Pierre-Luc Drouin > > On Mon, 14 Jul 2003, Eddy Offermann wrote: > > > Hi Pierre, > > > > For the moment use Double_t TMatrixD::Determinant() in a future release > > I will have InvertPosdef changed to InverPosdef(Double_t *determ_ptr = 0) > > so that if you supply a pointer to a Double_t the determinant is returned > > (like the Invert function) > >
This archive was generated by hypermail 2b29 : Thu Jan 01 2004 - 17:50:13 MET