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## [Bug-gsl] bigauss.c

**From**: |
Nina Kuckländer |

**Subject**: |
[Bug-gsl] bigauss.c |

**Date**: |
Fri, 11 Feb 2005 18:10:45 +0100 |

**User-agent**: |
Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.7.5) Gecko/20041217 |

hello!
i looked through the gsl-source code to see how random distributions were
constructed. in
gsl/randist/bigauss.c of gsl-1.6 there is wrong documentation code:
/* The Bivariate Gaussian probability distribution is
p(x,y) dxdy = (1/(2 pi sigma_x sigma_y sqrt(r)))
exp(-(x^2 + y^2 - 2 r x y)/(2c)) dxdy
*/
this is of course
/* The Bivariate Gaussian probability distribution is
p(x,y) dxdy = (1/(2 pi sigma_x sigma_y sqrt(1-r^2)))
exp(-(x^2/\sigma_x^2 + y^2/\sigma_y^2 - 2 r x
y/(\sigma_x\sigma_y))/2(1-r^2)) dxdy
*/
greetings from Potsdam, Germany,
Nina
--
Nina Kuckländer
Institut für Physik
Lehrstuhl Nichtlineare Dynamik
Am neuen Palais 10, Haus 19
14469 Potsdam
work: 0331/9771646 *NEU*

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**[Bug-gsl] bigauss.c**,
*Nina Kuckländer* **<=**