Re: [Math] Re: LU decomposition very SLOW (commons.math3.linear)

2016-10-29 Thread Gilles
Hi. This conversation should preferably be continued on the "dev" ML. [CC'ing there.] Best regards, Gilles On Sat, 29 Oct 2016 13:43:43 +0200, Eric Barnhill wrote: Hi Wilbur, That is strange that such a basic technique appears to be at odds with best practices, especially when said best

Re: [Math] Re: LU decomposition very SLOW (commons.math3.linear)

2016-10-29 Thread Eric Barnhill
Hi Wilbur, That is strange that such a basic technique appears to be at odds with best practices, especially when said best practice is out of numerical recipes, which has such broad authority. I think you would be welcome to push the change if you were interested to and your contribution would

Re: [Math] Re: LU decomposition very SLOW (commons.math3.linear)

2016-10-28 Thread Gilles
Hi. On Thu, 27 Oct 2016 05:41:08 -0700 (PDT), wilbur wrote: Hello Gilles, thanks for your interest! I am attaching a minimal example that demonstrates this behavior. The matrix -- which I create with MatrixUtils.createRealMatrix() -- is dense (of type BlockRealMatrix). Could you please

Re: [Math] Re: LU decomposition very SLOW (commons.math3.linear)

2016-10-27 Thread wilbur
Hello Gilles, thanks for your interest! I am attaching a minimal example that demonstrates this behavior. The matrix -- which I create with MatrixUtils.createRealMatrix() -- is dense (of type BlockRealMatrix). The results listed at the bottom of the main class suggest, that execution times for