[Pkg-octave-devel] Bug#335195: octave2.1: document incomplete gamma function
Package: octave2.1
Version: 2.1.69-1
Severity: minor
There are several functions called "incomplete gamma function" in the
literature. I suggest this patch to relate this function to the
standard nomenclature - i.e. (using TeX) which one of
$ \gamma(a,z) $ with limiting value $ \gamma(a,\infty)=\Gamma(a) $
$ \Gamma(a,z) $ with limiting value $ \Gamma(a,\infty)=0 $
$ P(a,z) $ with limiting value $ P(a,\infty)=1 $
is being calculated.
- Jim Van Zandt
--- src/DLD-FUNCTIONS/gammainc.cc-old 2005-10-22 09:55:46.000000000 -0400
+++ src/DLD-FUNCTIONS/gammainc.cc 2005-10-22 10:05:15.000000000 -0400
@@ -36,7 +36,7 @@
DEFUN_DLD (gammainc, args, ,
"-*- texinfo -*-\n\
@deftypefn {Mapping Function} {} gammainc (@var{x}, @var{a})\n\
-Computes the incomplete gamma function,\n\
+Computes the normalized incomplete gamma function,\n\
@iftex\n\
@tex\n\
$$\n\
@@ -55,6 +55,9 @@
@end smallexample\n\
@end ifinfo\n\
\n\
+with the limiting value of 1 as X goes to infinity.
+The standard notation is P(A,X), e.g. Abramowitz & Stegun (6.5.1).
+\n\
If @var{a} is scalar, then @code{gammainc (@var{x}, @var{a})} is returned\n\
for each element of @var{x} and vice versa.\n\
\n\
-- System Information:
Debian Release: testing/unstable
APT prefers testing
APT policy: (990, 'testing'), (500, 'oldstable'), (500, 'unstable')
Architecture: i386 (i686)
Shell: /bin/sh linked to /bin/bash
Kernel: Linux 2.4.29
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
Versions of packages octave2.1 depends on:
ii atlas3-base [liblapack.s 3.6.0-19 Automatically Tuned Linear Algebra
ii fftw3 3.0.1-11 Library for computing Fast Fourier
ii lapack3 [liblapack.so.3] 3.0.20000531a-6 library of linear algebra routines
ii libc6 2.3.5-6 GNU C Library: Shared libraries an
ii libg2c0 1:3.4.4-5 Runtime library for GNU Fortran 77
ii libgcc1 1:4.0.1-2 GCC support library
ii libhdf5-serial-1.6.2-0 [ 1.6.2-3 Hierarchical Data Format 5 (HDF5)
ii libncurses5 5.4-9 Shared libraries for terminal hand
ii libreadline5 5.0-10 GNU readline and history libraries
ii libstdc++5 1:3.3.6-7 The GNU Standard C++ Library v3
ii texinfo 4.7-2.2 Documentation system for on-line i
ii zlib1g 1:1.2.2-4 compression library - runtime
octave2.1 recommends no packages.
-- no debconf information
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