setdiff output differs from matlab

Michael Ferris ferris at cs.wisc.edu
Tue Sep 9 13:07:45 CDT 2008 

To: bug at octave.org
Cc: ferris
Subject: setdiff output differs from matlab

Bug report for Octave 3.0.0 configured for i686-pc-linux-gnu

Description:
-----------

In octave: x = 1:5; y = setdiff(x,x); size(y)
ans =

     0     0

In matlab: x = 1:5; y = setdiff(x,x); size(y)
ans =

     1     0

Repeat-By:
---------

as above

Fix:
---

Am I supposed to work around this (I believe the output from matlab is
in fact logically correct, but maybe I am missing something)?

Configuration (please do not edit this section):
-----------------------------------------------

uname output:     Linux banquo.cs.wisc.edu 2.6.18-92.1.6.el5 #1 SMP Fri Jun 20 02:36:16 EDT 2008 i686 i686 i386 GNU/Linux
configure opts:   '--prefix=/s/octave-3.0.0/@sys' 'CFLAGS=-I/s/hdf5-1.6.6/include -I/s/glpk-4.25/include -I/s/fftw-3.1.2/include -I/s/qhull-2003.1/include -I/s/SuiteSparse-3.1.0/include' 'LDFLAGS=-L/s/hdf5-1.6.6/lib -L/s/glpk-4.25/lib -L/s/fftw-3.1.2/lib -L/s/qhull-2003.1/lib -L/s/blas-2005/lib -L/s/lapack-3.1.1/lib -L/s/SuiteSparse-3.1.0/lib -Wl,-rpath,/s/glpk-4.25/lib:/s/hdf5-1.6.6/lib:/s/fftw-3.1.2/lib:/s/qhull-2003.1/lib' 'CXXFLAGS=-I/s/hdf5-1.6.6/include -I/s/glpk-4.25/include -I/s/fftw-3.1.2/include -I/s/qhull-2003.1/include -I/s/SuiteSparse-3.1.0/include' 'F77=gfortran'
Fortran compiler: gfortran
FFLAGS:           -O -mieee-fp
F2C:              @F2C@
F2CFLAGS:         @F2CFLAGS@
FLIBS:            -L/s/hdf5-1.6.6/lib -L/s/glpk-4.25/lib -L/s/fftw-3.1.2/lib -L/s/qhull-2003.1/lib -L/s/blas-2005/lib -L/s/lapack-3.1.1/lib -L/s/SuiteSparse-3.1.0/lib -L/usr/lib/gcc/i386-redhat-linux/4.1.2 -L/usr/lib/gcc/i386-redhat-linux/4.1.2/../../.. -lhdf5 -lz -lgfortranbegin -lgfortran -lm
CPPFLAGS:         
INCFLAGS:         -I. -I../octave-3.0.0 -I. -I./liboctave -I./src -I./libcruft/misc -I../octave-3.0.0 -I../octave-3.0.0/liboctave -I../octave-3.0.0/src -I../octave-3.0.0/libcruft/misc
C compiler:       gcc, version 4.1.2 20070626 (Red Hat 4.1.2-14)
CFLAGS:           -I/s/hdf5-1.6.6/include -I/s/glpk-4.25/include -I/s/fftw-3.1.2/include -I/s/qhull-2003.1/include -I/s/SuiteSparse-3.1.0/include
CPICFLAG:         -fPIC
C++ compiler:     g++, version 4.1.2
CXXFLAGS:         -I/s/hdf5-1.6.6/include -I/s/glpk-4.25/include -I/s/fftw-3.1.2/include -I/s/qhull-2003.1/include -I/s/SuiteSparse-3.1.0/include
CXXPICFLAG:       -fPIC
LD_CXX:           g++
LDFLAGS:          -L/s/hdf5-1.6.6/lib -L/s/glpk-4.25/lib -L/s/fftw-3.1.2/lib -L/s/qhull-2003.1/lib -L/s/blas-2005/lib -L/s/lapack-3.1.1/lib -L/s/SuiteSparse-3.1.0/lib -Wl,-rpath,/s/glpk-4.25/lib:/s/hdf5-1.6.6/lib:/s/fftw-3.1.2/lib:/s/qhull-2003.1/lib
LIBFLAGS:         -L.
RLD_FLAG:         -Wl,-rpath -Wl,/s/octave-3.0.0/@sys/lib/octave-3.0.0
BLAS_LIBS:        
FFTW_LIBS:        -lfftw3
LIBS:             -lreadline  -lncurses -ldl -lhdf5 -lz -lm 
LEXLIB:           
LIBGLOB:          
SED:              /bin/sed
DEFS:

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  -DHAVE_TIMES=1 -DYYTEXT_POINTER=1 -DGNUPLOT_BINARY="gnuplot"

User-preferences (please do not edit this section):
--------------------------------------------------

  EDITOR = /s/std/bin/emacs
  EXEC_PATH = /s/octave-3.0.0/@sys/libexec/octave/3.0.0/site/exec/i686-pc-linux-gnu:/s/octave-3.0.0/@sys/libexec/octave/api-v32/site/exec/i686-pc-linux-gnu:/s/octave-3.0.0/@sys/libexec/octave/site/exec/i686-pc-linux-gnu:/s/octave-3.0.0/@sys/libexec/octave/3.0.0/exec/i686-pc-linux-gnu:/s/octave-3.0.0/@sys/bin::/u/f/e/ferris/bin:/s/gcc-4.2.0/bin:/s/std/bin:/usr/X11R6/bin:/usr/afsws/bin:/s/hpf/bin:/bin:/usr/bin:/p/gams/systems/lnx/22.7:/p/gams/bin:/p/gams/bin/buildtools:/s/cplex-9.1/bin:/p/ferris/ampl/bin:/unsup/condor/bin:/s/handin/bin:.
  IMAGE_PATH = .:/s/octave-3.0.0/@sys/share/octave/3.0.0/imagelib
  PAGER = less
  PS1 = \s:\#> 
  PS2 = > 
  PS4 = + 
  beep_on_error = 0
  completion_append_char =  
  crash_dumps_octave_core = 1
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  gnuplot_command_plot = pl
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  gnuplot_command_with = w
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