Hi, 2015-06-24 16:59 GMT+09:00 Ian Hinder <[email protected]>:
> > On 24 Jun 2015, at 03:15, Hee Il Kim <[email protected]> wrote: > > Hi, > > Recently, I found the multipole moment calculations in QuasiLocalMeasures > show large errors, e.g. 20% for the second mass moment of my project. > > The error exists even in the test data of the thorn but it's around a few > percent. > > > Note that the "test" directory contains regression tests, which are > designed to check that the results haven't changed unintentionally when the > code changes. They are not meant to test correctness. As such, there is no > claim of accuracy for their results. In fact, they should be as small and > fast as possible, which usually means that they are NOT accurate. I'm not > saying that there is no problem; just that the parameter files in the > "test" directory should not be considered as tests of the correctness of > the code. > > I understand. But the issue is, even though I'm using sufficiently high resolution for my collapsing star study, the code calculates inaccurately the higher multipole moments for n >0, where n is the order of the Legendre polynomial. So it calculates the mass and the spin very accurately. > Which version of the code are you using? > > It has not changed much recently. > > $ svn log > https://svn.cct.lsu.edu/repos/numrel/LSUThorns/QuasiLocalMeasures/trunk/ > > ------------------------------------------------------------------------ > r57 | eschnett | 2015-04-27 19:05:14 +0200 (Mon, 27 Apr 2015) | 1 line > I'm using the one in ET branch, /repos/numrel/LSUThorns/QuasiLocalMeasures/!svn/ver/54/branches/ET_2014_11 Thanks, Hee Il
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