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## Re: [Help-gsl] logic error logarithms

**From**: |
Thomas Weber |

**Subject**: |
Re: [Help-gsl] logic error logarithms |

**Date**: |
Wed, 18 Jan 2006 21:49:17 +0100 |

HI,
Am Mittwoch, den 18.01.2006, 08:19 -0800 schrieb yperez_riverol (sent by
Nabble.com):
>* I want calculate logarithms base 2 of x.*
>* for this my code is:*
>* *
>* result = (gsl_sf_log(x)/gsl_sf_log(2));*
First guess: result is an integer (which explains why you get 6 and not
6.6439)
>* when x=100 the logic result=2, but the program show me 6.*
Huh? The log2 of 100 is the number y, which fulfills
2^y = 100.
So y=2 is quite obviously not the correct solution (unless you have a
very special logic).
Regards
Thomas