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Frobenius norm of a null matrix is not zero

by Jean-Francois Cardoso-2 :: Rate this Message:

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--------
Bug report for Octave 3.0.0 configured for i386-apple-darwin8.11.1

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

        The Frobenius norm of a null matrix is reported to be NaN
        and a warning is raised.

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

        norm(zeros(5), "fro" )


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

uname output:     Darwin rajif 8.11.1 Darwin Kernel Version 8.11.1: Wed
Oct 10 18:23:28 PDT 2007; root:xnu-792.25.20~1/RELEASE_I386 i386 i386
configure opts:   'LDFLAGS=-L/usr/local/lib'
'CPPFLAGS=-I/usr/local/include/readline'
Fortran compiler: gfortran
FFLAGS:           -O -mieee-fp
F2C:              @F2C@
F2CFLAGS:         @F2CFLAGS@
FLIBS:            -L/usr/local/lib
-L/usr/local/lib/gcc/i386-apple-darwin8.8.1/4.2.0
-L/usr/local/lib/gcc/i386-apple-darwin8.8.1/4.2.0/../../.. -lz -lm
-lgfortranbegin -lgfortran
CPPFLAGS:         -I/usr/local/include/readline -I/usr/local/include
INCFLAGS:         -I. -I. -I./liboctave -I./src -I./libcruft/misc
C compiler:       gcc, version 4.0.1 (Apple Computer, Inc. build 5367)
CFLAGS:           -g -O2
CPICFLAG:         -fPIC
C++ compiler:     g++, version 4.0.1
CXXFLAGS:         -g -O2
CXXPICFLAG:       -fPIC
LD_CXX:           g++
LDFLAGS:          -L/usr/local/lib
LIBFLAGS:         -L.
RLD_FLAG:
BLAS_LIBS:        -Wl,-framework -Wl,vecLib
FFTW_LIBS:        -lfftw3
LIBS:             -lreadline  -lncurses -lz -lm
LEXLIB:
LIBGLOB:
SED:              /usr/local/bin/sed
DEFS:

   -DPACKAGE_NAME="" -DPACKAGE_TARNAME="" -DPACKAGE_VERSION=""
   -DPACKAGE_STRING="" -DPACKAGE_BUGREPORT="" -DOCTAVE_SOURCE=1
   -D_GNU_SOURCE=1 -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1
   -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1
   -DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DHAVE_UNISTD_H=1 -DSEPCHAR=':'
   -DSEPCHAR_STR=":" -D__NO_MATH_INLINES=1 -DCXX_NEW_FRIEND_TEMPLATE_DECL=1
   -DCXX_ISO_COMPLIANT_LIBRARY=1 -DCXX_ABI=gnu_v3
-DCXX_PREPENDS_UNDERSCORE=1
   -DHAVE_LIBM=1 -DHAVE_QHULL=1 -DHAVE_PCRE=1 -DHAVE_REGEXEC=1
   -DHAVE_REGEX=1 -DHAVE_ZLIB_H=1 -DHAVE_ZLIB=1 -DHAVE_FFTW3=1
   -DHAVE_GLPK_H=1 -DHAVE_GLPK=1 -DHAVE_IEEE754_DATA_FORMAT=1
   -DF77_FUNC(name,NAME)=name ## _ -DF77_FUNC_(name,NAME)=name ## _
   -DHAVE_BLAS=1 -DHAVE_GETHOSTNAME=1 -DHAVE_GETPWNAM=1 -DHAVE_DEV_T=1
   -DHAVE_INO_T=1 -DHAVE_NLINK_T=1 -DHAVE_NLINK_T=1 -DHAVE_LONG_LONG_INT=1
   -DHAVE_UNSIGNED_LONG_LONG_INT=1 -DHAVE_SIGSET_T=1 -DHAVE_SIG_ATOMIC_T=1
   -DSIZEOF_SHORT=2 -DSIZEOF_INT=4 -DSIZEOF_LONG=4 -DSIZEOF_LONG_LONG=8
   -DHAVE_ALLOCA_H=1 -DHAVE_ALLOCA=1 -DNPOS=std::string::npos
   -DHAVE_PLACEMENT_DELETE=1 -DHAVE_DYNAMIC_AUTO_ARRAYS=1 -DSTDC_HEADERS=1
   -DHAVE_DIRENT_H=1 -DTIME_WITH_SYS_TIME=1 -DHAVE_SYS_WAIT_H=1
   -DHAVE_ASSERT_H=1 -DHAVE_CURSES_H=1 -DHAVE_DLFCN_H=1 -DHAVE_FCNTL_H=1
   -DHAVE_FLOAT_H=1 -DHAVE_GRP_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_LIMITS_H=1
   -DHAVE_LOCALE_H=1 -DHAVE_MEMORY_H=1 -DHAVE_NCURSES_H=1 -DHAVE_POLL_H=1
   -DHAVE_PWD_H=1 -DHAVE_STDINT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1
   -DHAVE_SYS_IOCTL_H=1 -DHAVE_SYS_PARAM_H=1 -DHAVE_SYS_POLL_H=1
   -DHAVE_SYS_RESOURCE_H=1 -DHAVE_SYS_SELECT_H=1 -DHAVE_SYS_STAT_H=1
   -DHAVE_SYS_TIME_H=1 -DHAVE_SYS_TIMES_H=1 -DHAVE_SYS_TYPES_H=1
   -DHAVE_SYS_UTSNAME_H=1 -DHAVE_TERMCAP_H=1 -DHAVE_UNISTD_H=1
   -DHAVE_UTIME_H=1 -DHAVE_SSTREAM=1 -DHAVE_SGTTY_H=1 -DHAVE_GLOB_H=1
   -DHAVE_FNMATCH_H=1 -DHAVE_FNMATCH=1 -DHAVE_GLOB=1 -DHAVE_ATEXIT=1
   -DHAVE_BASENAME=1 -DHAVE_BCOPY=1 -DHAVE_BZERO=1 -DHAVE_CHMOD=1
   -DHAVE_DUP2=1 -DHAVE_ENDGRENT=1 -DHAVE_ENDPWENT=1 -DHAVE_EXECVP=1
   -DHAVE_FCNTL=1 -DHAVE_FORK=1 -DHAVE_GETCWD=1 -DHAVE_GETEGID=1
   -DHAVE_GETEUID=1 -DHAVE_GETGID=1 -DHAVE_GETGRENT=1 -DHAVE_GETGRGID=1
   -DHAVE_GETGRNAM=1 -DHAVE_GETPGRP=1 -DHAVE_GETPID=1 -DHAVE_GETPPID=1
   -DHAVE_GETPWENT=1 -DHAVE_GETPWUID=1 -DHAVE_GETTIMEOFDAY=1 -DHAVE_GETUID=1
   -DHAVE_GETWD=1 -DHAVE_KILL=1 -DHAVE_LGAMMA=1 -DHAVE_LINK=1
   -DHAVE_LOCALTIME_R=1 -DHAVE_LSTAT=1 -DHAVE_MEMMOVE=1 -DHAVE_MKDIR=1
   -DHAVE_MKFIFO=1 -DHAVE_MKSTEMP=1 -DHAVE_PIPE=1 -DHAVE_POLL=1
   -DHAVE_PUTENV=1 -DHAVE_RAISE=1 -DHAVE_READLINK=1 -DHAVE_REALPATH=1
   -DHAVE_RENAME=1 -DHAVE_RINDEX=1 -DHAVE_RMDIR=1 -DHAVE_ROUND=1
   -DHAVE_SELECT=1 -DHAVE_SETGRENT=1 -DHAVE_SETLOCALE=1 -DHAVE_SETPWENT=1
   -DHAVE_SETVBUF=1 -DHAVE_SIGACTION=1 -DHAVE_SIGLONGJMP=1
-DHAVE_SIGPENDING=1
   -DHAVE_SIGPROCMASK=1 -DHAVE_SIGSUSPEND=1 -DHAVE_SNPRINTF=1 -DHAVE_STAT=1
   -DHAVE_STRCASECMP=1 -DHAVE_STRDUP=1 -DHAVE_STRERROR=1
-DHAVE_STRNCASECMP=1
   -DHAVE_STRPTIME=1 -DHAVE_STRSIGNAL=1 -DHAVE_SYMLINK=1 -DHAVE_TEMPNAM=1
   -DHAVE_TGAMMA=1 -DHAVE_UMASK=1 -DHAVE_UNAME=1 -DHAVE_UNLINK=1
   -DHAVE_USLEEP=1 -DHAVE_UTIME=1 -DHAVE_VFPRINTF=1 -DHAVE_VSPRINTF=1
   -DHAVE_VSNPRINTF=1 -DHAVE_WAITPID=1 -DHAVE_STRFTIME=1
   -DOCTAVE_HAVE_BROKEN_STRPTIME=1 -DHAVE_DYLD_API=1
   -DENABLE_DYNAMIC_LINKING=1 -DHAVE_TIMEVAL=1 -DHAVE_FINITE=1
   -DHAVE_ISNAN=1 -DHAVE_ISINF=1 -DHAVE_COPYSIGN=1 -DHAVE_DECL_SIGNBIT=1
   -DHAVE_ACOSH=1 -DHAVE_ASINH=1 -DHAVE_ATANH=1 -DHAVE_ERF=1 -DHAVE_ERFC=1
   -DHAVE_EXP2=1 -DHAVE_LOG2=1 -DHAVE_STRUCT_STAT_ST_BLKSIZE=1
   -DHAVE_STRUCT_STAT_ST_BLOCKS=1 -DHAVE_STRUCT_STAT_ST_RDEV=1
   -DHAVE_STRUCT_TM_TM_ZONE=1 -DHAVE_TM_ZONE=1 -DUSE_READLINE=1
   -DEXCEPTION_IN_MATH=1 -DRETSIGTYPE=void -DHAVE_DECL_SYS_SIGLIST=1
   -DHAVE_POSIX_SIGNALS=1 -DRETSIGTYPE_IS_VOID=1 -DHAVE_GETRUSAGE=1
   -DHAVE_TIMES=1 -DYYTEXT_POINTER=1 -DGNUPLOT_BINARY="gnuplot"

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

   EDITOR = emacs
   EXEC_PATH =
/usr/local/libexec/octave/3.0.0/site/exec/i386-apple-darwin8.11.1:/usr/local/libexec/octave/api-v32/site/exec/i386-apple-darwin8.11.1:/usr/local/libexec/octave/site/exec/i386-apple-darwin8.11.1:/usr/local/libexec/octave/3.0.0/exec/i386-apple-darwin8.11.1:/usr/local/bin:/sw/bin:/sw/sbin:/bin:/sbin:/usr/bin:/usr/sbin:/usr/X11R6/bin:/usr/local/bin:/Users/cardoso/bin:/Users/cardoso/bin:/Users/cardoso/local/bin:/Volumes/partage/Soft/Astro/Healpix_2.01/src/cxx/generic_gcc/bin
   IMAGE_PATH = .:/usr/local/share/octave/3.0.0/imagelib
   PAGER = less
   PS1 = \s:\#>
   PS2 = >
   PS4 = +
   beep_on_error = 0
   completion_append_char =
   crash_dumps_octave_core = 1
   echo_executing_commands = 0
   fixed_point_format = 0
   gnuplot_binary = /usr/local/bin/gnuplot
   gnuplot_command_end =

   gnuplot_command_plot = pl
   gnuplot_command_replot = rep
   gnuplot_command_splot = sp
   gnuplot_command_title = t
   gnuplot_command_using = u
   gnuplot_command_with = w
   history_file = /Users/cardoso/.octave_hist
   history_size = 1024
   ignore_function_time_stamp = system
   info_file = /usr/local/share/info/octave.info
   info_program = info
   makeinfo_program = makeinfo
   max_recursion_depth = 256
   output_max_field_width = 5
   output_precision = 5
   page_output_immediately = 1
   page_screen_output = 0
   print_answer_id_name = 1
   print_empty_dimensions = 1
   save_precision = 16
   saving_history = 1
   sighup_dumps_octave_core = 1
   sigterm_dumps_octave_core = 1
   silent_functions = 0
   split_long_rows = 1
   string_fill_char =
   struct_levels_to_print = 2
   suppress_verbose_help_message = 0
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