Mercurial > octave-nkf
view scripts/specfun/betaln.m @ 18840:4a4edf0f2077 nkf-ready
fix LLVM 3.4 build (bug #41061)
* configure.ac: Call new functions OCTAVE_LLVM_RAW_FD_OSTREAM_API and
OCTAVE_LLVM_LEGACY_PASSMANAGER_API, check for Verifier.h header file
* m4/acinclude.m4 (OCTAVE_LLVM_RAW_FD_OSTREAM_API): New function to
detect correct raw_fd_ostream API
* m4/acinclude.m4 (OCTAVE_LLVM_LEGACY_PASSMANAGER_API): New function
to detect legacy passmanager API
* libinterp/corefcn/jit-util.h: Use legacy passmanager namespace if
necessary
* libinterp/corefcn/pt-jit.h (class tree_jit): Use legacy passmanager
class if necessary
* libinterp/corefcn/pt-jit.cc: Include appropriate header files
* libinterp/corefcn/pt-jit.cc (tree_jit::initialize): Use legacy
passmanager if necessary
* libinterp/corefcn/pt-jit.cc (tree_jit::optimize): Use correct API
* libinterp/corefcn/jit-typeinfo.cc: Include appropriate header file
author | Stefan Mahr <dac922@gmx.de> |
---|---|
date | Sun, 11 May 2014 02:28:33 +0200 |
parents | d63878346099 |
children | 4591a1238ee0 |
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## Copyright (C) 1998-2013 Nicol N. Schraudolph ## ## This file is part of Octave. ## ## Octave is free software; you can redistribute it and/or modify it ## under the terms of the GNU General Public License as published by ## the Free Software Foundation; either version 3 of the License, or (at ## your option) any later version. ## ## Octave is distributed in the hope that it will be useful, but ## WITHOUT ANY WARRANTY; without even the implied warranty of ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ## General Public License for more details. ## ## You should have received a copy of the GNU General Public License ## along with Octave; see the file COPYING. If not, see ## <http://www.gnu.org/licenses/>. ## -*- texinfo -*- ## @deftypefn {Mapping Function} {} betaln (@var{a}, @var{b}) ## Return the natural logarithm of the Beta function, ## @tex ## $$ ## {\rm betaln} (a, b) = \ln (B (a,b)) \equiv \ln ({\Gamma (a) \Gamma (b) \over \Gamma (a + b)}). ## $$ ## @end tex ## @ifnottex ## ## @example ## betaln (a, b) = log (beta (a, b)) ## @end example ## ## @end ifnottex ## calculated in a way to reduce the occurrence of underflow. ## @seealso{beta, betainc, gammaln} ## @end deftypefn ## Author: Nicol N. Schraudolph <nic@idsia.ch> ## Created: 06 Aug 1998 ## Keywords: log beta special function function retval = betaln (a, b) if (nargin != 2) print_usage (); endif retval = gammaln (a) + gammaln (b) - gammaln (a + b); endfunction %!assert (betaln (3,4), log (beta (3,4)), eps) %% Test input validation %!error (betaln (1)) %!error (betaln (1,2,3))