semilogx fails without warning if x-axis starts with 0

Bug report for Octave 3.2.2 configured for i686-pc-mingw32

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

If semilogx is called where the x coordinates start with 0, only an empty window appears
without any further error message. In Octave 3.0/gnuplot 4.3.0 a warning was shown that the
value 0 is ignored and the rest of the data was plotted.

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

Execute:
semilogx( [0 0.1 1 10], [1 2 3 4] )

Fix:
---

Should work similar to Octave 3.0 behaviour or show some error why plotting the data failed.


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

uname output:     Windows
configure opts:
Fortran compiler: mingw32-gfortran-4.3.0-dw2
FFLAGS:           -O -mieee-fp
FLIBS:            -lgfortran
CPPFLAGS:         -march=i686 -mtune=generic -O2
INCFLAGS:         -I. -I/octmgw32/octave/octave-3.2.2 -I. -I./liboctave -I./src -I./libcruft/misc
-I/octmgw32/octave/octave-3.2.2 -I/octmgw32/octave/octave-3.2.2/liboctave -I/octmgw32/octave/octave-3.2.2/src
-I/octmgw32/octave/octave-3.2.2/libcruft/misc
C compiler:       mingw32-gcc-4.3.0-dw2, version4.3.0-dw2 (GCC TDM-2 for MinGW)
CFLAGS:           -Wall
CPICFLAG:
C++ compiler:     mingw32-g++-4.3.0-dw2, version4.3.0-dw2
CXXFLAGS:         -D_DLL -Wall
CXXPICFLAG:
LD_CXX:           mingw32-g++-4.3.0-dw2
LDFLAGS:          -shared-libgcc -Wl,--exclude-libs=-lstdc++_s -Wl,--allow-multiple-definition
LIBFLAGS:         -L.
RLD_FLAG:
BLAS_LIBS:        -llapack -lblas
FFTW_LIBS:        -lfftw3 -lfftw3f
LIBS:             -lreadline  -lncurses -liberty -lblas -lhdf5 -lz -lm  -lgdi32 -lws2_32 -luser32 -lkernel32
LEXLIB:
LIBGLOB:          -lglob
SED:              /usr/bin/sed
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User-preferences (please do not edit this section):

  EDITOR = D:\Program Files\Science\Octave 3.2\tools\notepad++\notepad++.exe
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3.2\libexec\octave\api-v37\site\exec\i686-pc-mingw32;D:\Program Files\Science\Octave
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3.2\bin;D:\PROGRA~1\Tools\GTK\bin;c:\program files\pc connectivity
solution\;d:\development\java\javafx-sdk\bin;d:\development\java\javafx-sdk\emulator\bin;d:\program
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[Søren Hauberg]

man, 02 11 2009 kl. 19:15 +0100, skrev Stefan Hepp:
> If semilogx is called where the x coordinates start with 0, only an empty window appears
> without any further error message. In Octave 3.0/gnuplot 4.3.0 a warning was shown that the
> value 0 is ignored and the rest of the data was plotted.

I get the expected (correct) behaviour in the development version on
Linux with gnuplot 4.3 (patchlevel 0).

Søren

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