On 14 March 2018 at 09:16, Andrei Alexandrescu via Digitalmars-d <digitalmars-d@puremagic.com> wrote: > On 03/14/2018 01:01 AM, 9il wrote: >> >> On Tuesday, 13 March 2018 at 17:10:03 UTC, jmh530 wrote: >>> >>> "Note that using row-major ordering may require more memory and time than >>> column-major ordering, because the routine must transpose the row-major >>> order to the column-major order required by the underlying LAPACK routine." >> >> >> Maybe we should use only column major order. --Ilya > > > Has row-major fallen into disuse?
FWIW, I've never wanted row-major in my career; almost all linear algebra for geometric use. Columns correspond to spatial axis, and that's almost always what you want to manipulate... so column-major it is. Or with colour transformation, columns correspond to RGB primaries; same story.