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Thanks much for your comments Chris. Yeah, we guessed the problem is likely, as you suggest, in trying to get the Inverse - that sucker was running over 24 hrs and never finished so we pretty much gave up ...

When you advise to "use iterative solvers instead" can you help me understand what those are / do / how to "use" -- that is "invoke" -- for my particular application/calc I'm trying to accomplish?

Unless I missed it completely, the Math.net documentation is really sketchy; i guess there's an assumption that anyone who would wander in knows these basics.

And I have to admit I'm a bit out of my element here tho was a pgmr in past life (way past) and a tiny math major at one time (even more way past). So have sent your comments on to my science guy (who knows the matrix math) and my sw eng (who knows C#) ... both better than I.

Y



On Sat, Dec 1, 2012 at 8:50 AM, wo80 <notifications@codeplex.com> wrote:

From: wo80

@Yvonne

You really don't want to do Inverse() on a sparse matrix, since the result will most likely not be sparse. Use iterative solvers instead.

If you are looking for sparse direct solvers: a few days ago I published a .NET version of CSparse here on CodeProject:CSparse.NET

Read the full discussion online.

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Yvonne Burgess
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Climate Earth, Inc.
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