Hi all,
Jody, Tyler, and I hacked at this on Friday during a code sprint. The
partial results are here:
https://github.com/geotools/geotools/commits/matrix
There are a few remaining errors to track down, and the cautious part of
me wants to go back and cook up a set of unit tests for GeneralMatrix.
Anyhow, since we are all traveling for the next few days, I wanted to
ask what the best way to coordinate future effort is?
If anyone else is interested pitching in, let us know.
Thanks,
Jim
p.s. The commits from an 'Alex Tatusko' are from me. I goofed up and
didn't change the Git info on a loaner laptop.
On 03/13/2015 03:55 PM, Jody Garnett wrote:
A bit more research shows we should support the geotools Matrix and
XMatrix methods (giving us a limited set of methods to implement).
Proposal updated accordingly ...
--
Jody Garnett
On 13 March 2015 at 12:31, Andrea Aime <andrea.a...@geo-solutions.it
<mailto:andrea.a...@geo-solutions.it>> wrote:
On Fri, Mar 13, 2015 at 7:57 PM, Jody Garnett
<jody.garn...@gmail.com <mailto:jody.garn...@gmail.com>> wrote:
At the foss4gna code sprint, here is a proposal to make this
change:
http://docs.codehaus.org/display/GEOTOOLS/Change+from+vecmath+to+EJML
Looking at this with Jim, the library has DenseMatrix64F
(which does the work) and an example of wrapping this up for
normal use called SimpleMatrix.
Each operation in SimpleMatrix makes a copy, an overhead we
could avoid by using DenseMatrix64F ourself. So the proposal
is to delegate to DenseMatrix64F, using SimpleMatrix (and its
friend BaseMatrix) as a guide.
Alternatively we could kill our GeneralMatrix class and use
SimpleMatrix directly in the rest of the GeoTools codebase, it
would be more an an API change - which is okay if people only
see this stuff inside MathTransforms. Anyone got an idea on
how visible GeneralMatrix is?
I don't... and guess we should try to keep it around. Anyways, the
direction appears to be sound, no objections.
Cheers
Andrea
--
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