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## Re: Study about accuracy of statistical software, incl. Octave

**From**: |
Marco Caliari |

**Subject**: |
Re: Study about accuracy of statistical software, incl. Octave |

**Date**: |
Tue, 24 Mar 2009 09:21:28 +0100 (CET) |

**User-agent**: |
Alpine 1.00 (DEB 882 2007-12-20) |

Dear Jaroslav,
I read the interesting paper http://www.imstat.org/bjps/papers/Almiron.pdf

`The attached patch (against 3.1.54) fixes the less important deficiency in
``the computation of the mean: it divides the vector by its maximum value before computing
``the mean. With the patch, the example NumAcc4 in Table 1 of the paper has
``15 correct digits. Moreover, now it is possible to compute
`
mean([1.7e308,1.6e308])

`getting the right answer and not Inf. The patch also works for matrices,
``but I don't know if the implementation is optimal.
`The other deficiencies are much harder to fix. I will give a look.
Best regards,
Marco

**
**`mean.diff`

*Description:* Text Data

**Study about accuracy of statistical software, incl. Octave**, *Ivan Sutoris*, `2009/03/22`
**Re: Study about accuracy of statistical software, incl. Octave**,
*Marco Caliari* **<=**
**Re: Study about accuracy of statistical software, incl. Octave**, *Jason Riedy*, `2009/03/24`
**Re: Study about accuracy of statistical software, incl. Octave**, *Marco Caliari*, `2009/03/24`
**Re: Study about accuracy of statistical software, incl. Octave**, *Jaroslav Hajek*, `2009/03/24`
**Re: Study about accuracy of statistical software, incl. Octave**, *Marco Caliari*, `2009/03/24`
**Re: Study about accuracy of statistical software, incl. Octave**, *John W. Eaton*, `2009/03/24`
**Re: Study about accuracy of statistical software, incl. Octave**, *Marco Caliari*, `2009/03/25`
**Re: Study about accuracy of statistical software, incl. Octave**, *Jaroslav Hajek*, `2009/03/24`
**Re: Study about accuracy of statistical software, incl. Octave**, *David Thompson*, `2009/03/24`
**Re: Study about accuracy of statistical software, incl. Octave**, *Jason Riedy*, `2009/03/24`
**Re: Study about accuracy of statistical software, incl. Octave**, *Jaroslav Hajek*, `2009/03/24`