Re: [math] Apache Commons Math Median performance

2019-05-29 Thread Eric Barnhill
Hi Marco, Thanks a lot for this feedback. I am one of the contribs building out the new commons-numbers release which will replace much of commons-math including the statistics libraries. I took a look at the commons-math code for Median. Based on my reading of it I am not surprised by what you

Re: [Math | Statistics] looking for an equivalent of both the R class "lm" and intrcept

2018-10-30 Thread Eric Barnhill
On Tue, Oct 30, 2018 at 4:22 AM Jonathan MERCIER wrote: > *R examples:* > > Y ~ A | Y = βo + β1A | Straight-line with an implicit > y-intercept > Y ~ -1 + A | Y = β1A | Straight-line with no y-intercept; > that is, a fit forced through (0,0) > SimpleRegression should

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