Package: octave-forge Version: 2006.07.09+dfsg1-8 Severity: normal Tags: patch
*** Please type your report below this line *** The calculation in mapping/azimuth.m in both the 2.1 and 2.9 branches of octave-forge gives incorrect values. A correct version of the calculation is given at http://williams.best.vwh.net/avform.htm#Crs Instead of the current calculation: < az = rad2deg(acot((sin(a) * cot(b) - cos(a) * cos(C)) / \ < sin(C))); the calculation should be: > az=rad2deg(mod(atan2(sin(C)*sin(b), \ > sin(a)*cos(b)-cos(a)*sin(b)*cos(C)),\ > 2*pi)); If azimuth.m is actually doing the right thing, then perhaps its documentation needs changing - as I read it, it calculates the angle of the great circle between the two points. This is not what the current calculation does. Apologies if I've got anything wrong - I'm fairly new to spherical geometry - do email to discuss this if necessary. -- System Information: Debian Release: 4.0 APT prefers testing APT policy: (500, 'testing') Architecture: i386 (i686) Shell: /bin/sh linked to /bin/bash Kernel: Linux 2.6.17.061206.1 Locale: LANG=en_GB, LC_CTYPE=en_GB (charmap=ISO-8859-1) Versions of packages octave-forge depends on: ii octave2.1-forge 2006.03.17+dfsg1-3 Contributed functions from the GNU octave-forge recommends no packages. -- no debconf information
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