From bug-request at octave dot org Wed Mar 22 09:11:09 2006 Subject: bincoeff gives wrong results on bad input From: martin To: bug at octave dot org, martin@old.homeip.net Date: Wed, 22 Mar 2006 08:41:31 -0600 To: bug at octave dot org Cc: martin at old dot homeip dot net Subject: bincoeff gives wrong results on bad input Bug report for Octave 2.1.72 configured for i486-pc-linux-gnu Description: ----------- Bincoeff succeeds silently on buggy input. Another note, nchoosek should perhaps work too, for matlab compatibility. Repeat-By: --------- octave:10> bincoeff(4, 55) ans = 0 # that is fine I guess octave:8> bincoeff(-4, 4) ans = 35 # I don't think it makes sense to give a result here? octave:7> bincoeff(-4, -1) ans = NaN # not sure about this one Configuration (please do not edit this section): ----------------------------------------------- uname output: Linux bazaar 2.6.13.4martin1 #1 Sun Oct 16 14:24:35 CEST 2005 i686 GNU/Linux configure opts: '--prefix=/usr' '--datadir=/usr/share' '--libdir=/usr/lib' '--libexecdir=/usr/lib' '--infodir=/usr/share/info' '--mandir=/usr/share/man' '--with-blas=-lblas-3' '--with-lapack=-llapack-3' '--with-hdf5' '--with-fftw' '--with-f77=/usr/bin/gfortran' '--enable-shared' '--enable-rpath' '--disable-static' '--build' 'i486-linux-gnu' 'CC=/usr/bin/gcc' 'CXX=/usr/bin/g++' 'F77=/usr/bin/gfortran' 'build_alias=i486-linux-gnu' Fortran compiler: /usr/bin/gfortran FFLAGS: -O2 F2C: F2CFLAGS: FLIBS: -L/usr/lib/gcc/i486-linux-gnu/4.0.3 -L/usr/lib/gcc/i486-linux-gnu/4.0.3/../../../../lib -L/usr/lib/gcc/i486-linux-gnu/4.0.3/../../.. -L/lib/../lib -L/usr/lib/../lib -lhdf5 -lz -lgfortranbegin -lgfortran -lm -lgcc_s CPPFLAGS: INCFLAGS: -I. -I. -I./liboctave -I./src -I./libcruft/misc C compiler: /usr/bin/gcc, version 4.0.3 20060115 (prerelease) (Debian 4.0.2-7) CFLAGS: -O2 CPICFLAG: -fPIC C++ compiler: /usr/bin/g++, version 4.0.3 CXXFLAGS: -O2 CXXPICFLAG: -fPIC LD_CXX: /usr/bin/g++ LDFLAGS: -s LIBFLAGS: -L. 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