[fitswcs] I've got this FITS WCS matrix

[Mark Calabretta]

On Wed 2004/08/18 15:51:38 -0400, Doug Mink wrote
in a message to: "Malcolm J. Currie" <mjc at star.rl.ac.uk>
and copied to: fitswcs at aoc.nrao.edu

>ago when ds9 needed to get a reliable rotation angle from any CD matrix.

Doug,

Are you saying that any 2x2 matrix can be factorized as a product of a
scale and a rotation?  Your code does not seem to admit otherwise.  What
factorization does it produce for Malcolm's matrix?

Cheers, Mark