subplot/semilogy error

Bug report for Octave 2.1.69 configured for i686-pc-linux-gnu

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

The sequence of commands below produces two plots.  
The lower plot contains the graph of the upper plot,
which it should not.

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

subplot(2,1,1)
axis ([0 2 0 3])
plot ([0 1], [1 1], 'b')

subplot(2,1,2)
axis([0 2 0.1 3])
semilogy ([0 2], [1 2], 'r')


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

uname output:     Linux faeton.uio.no 2.6.9-i686 #1 Mon Oct 25 21:09:12 CEST 
2004 i686 athlon i386 GNU/Linux
configure opts:   '--prefix=/work/local' 'CPPFLAGS=-I/work/local/include' 
'LDFLAGS=-L/work/local/lib'
Fortran compiler: g77
FFLAGS:           -O -mieee-fp
F2C:              
F2CFLAGS:         
FLIBS:            -L/work/local/lib -L/usr/lib/gcc-lib/i386-redhat-linux/3.2.3 
-L/usr/lib/gcc-lib/i386-redhat-linux/3.2.3/../../.. -lfrtbegin -lg2c -lm -lgcc_s
CPPFLAGS:         -I/work/local/include
INCFLAGS:         -I. -I. -I./liboctave -I./src -I./libcruft/misc  -I./glob 
-I./glob
C compiler:       gcc, version 3.2.3 20030502 (Red Hat Linux 3.2.3-49)
CFLAGS:           -g -O2
CPICFLAG:         -fPIC
C++ compiler:     g++, version 3.2.3
CXXFLAGS:         -g -O2
CXXPICFLAG:       -fPIC
LD_CXX:           g++
LDFLAGS:          -L/work/local/lib
LIBFLAGS:         -L.
RLD_FLAG:         -Wl,-rpath -Wl,/work/local/lib/octave-2.1.69
BLAS_LIBS:        -llapack -lblas
FFTW_LIBS:        -lfftw3
LIBS:             -lreadline  -lncurses -lm 
LEXLIB:           
LIBPLPLOT:        
LIBDLFCN:         
LIBGLOB:          ./glob/glob.o ./glob/fnmatch.o
SED:              /bin/sed
DEFS:

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  -DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DHAVE_UNISTD_H=1 -DSEPCHAR=1
  -DSEPCHAR_STR=":" -D__NO_MATH_INLINES=1 -DCXX_NEW_FRIEND_TEMPLATE_DECL=1
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  -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
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  -DHAVE_GETPWENT=1 -DHAVE_GETPWUID=1 -DHAVE_GETTIMEOFDAY=1
  -DHAVE_GETUID=1 -DHAVE_GETWD=1 -DHAVE_KILL=1 -DHAVE_LINK=1
  -DHAVE_LOCALTIME_R=1 -DHAVE_LSTAT=1 -DHAVE_MEMMOVE=1 -DHAVE_MKDIR=1
  -DHAVE_MKFIFO=1 -DHAVE_MKSTEMP=1 -DHAVE_ON_EXIT=1 -DHAVE_PIPE=1
  -DHAVE_POLL=1 -DHAVE_PUTENV=1 -DHAVE_RAISE=1 -DHAVE_READLINK=1
  -DHAVE_RENAME=1 -DHAVE_RINDEX=1 -DHAVE_RMDIR=1 -DHAVE_ROUND=1
  -DHAVE_SELECT=1 -DHAVE_SETGRENT=1 -DHAVE_SETPWENT=1 -DHAVE_SETVBUF=1
  -DHAVE_SIGACTION=1 -DHAVE_SIGLONGJMP=1 -DHAVE_SIGPENDING=1
  -DHAVE_SIGPROCMASK=1 -DHAVE_SIGSUSPEND=1 -DHAVE_STAT=1 -DHAVE_STRCASECMP=1
  -DHAVE_STRDUP=1 -DHAVE_STRERROR=1 -DHAVE_STRFTIME=1 -DHAVE_STRNCASECMP=1
  -DHAVE_STRPTIME=1 -DHAVE_SYMLINK=1 -DHAVE_TEMPNAM=1 -DHAVE_UMASK=1
  -DHAVE_UNLINK=1 -DHAVE_USLEEP=1 -DHAVE_VFPRINTF=1 -DHAVE_VSPRINTF=1
  -DHAVE_VSNPRINTF=1 -DHAVE_WAITPID=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_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
  -DSYS_SIGLIST_DECLARED=1 -DHAVE_SYS_SIGLIST=1 -DHAVE_POSIX_SIGNALS=1
  -DHAVE_GETRUSAGE=1 -DHAVE_TIMES=1 -DYYTEXT_POINTER=1
  -DGNUPLOT_BINARY="gnuplot" -DGNUPLOT_HAS_FRAMES=1

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

  DEFAULT_EXEC_PATH = 
"/work/local/libexec/octave/2.1.69/site/exec/i686-pc-linux-gnu:/work/local/libexec/octave/site/exec/i686-pc-linux-gnu:/work/local/libexec/octave/2.1.69/exec/i686-pc-linux-gnu:/work/local/bin"
  DEFAULT_LOADPATH = 
".:/work/local/libexec/octave/2.1.69/site/oct/i686-pc-linux-gnu//:/work/local/libexec/octave/site/oct/api-v13/i686-pc-linux-gnu//:/work/local/libexec/octave/site/oct/i686-pc-linux-gnu//:/work/local/share/octave/2.1.69/site/m//:/work/local/share/octave/site/api-v13/m//:/work/local/share/octave/site/m//:/work/local/libexec/octave/2.1.69/oct/i686-pc-linux-gnu//:/work/local/share/octave/2.1.69/m//"
  EDITOR = "/site/bin/emacs"
  EXEC_PATH = 
":/mn/marduk/ansatte-u1/karstent/bin:~/local/bin:/mn/gayomart/apps/encap/ghostscript-8.31/bin:/mn/marduk/ansatte-u1/karstent/bin:/site/common/hosts:/site/common/bin:/site/bin:/site/X11/bin:/site/pgi/linux86/bin:/usr/X11R6/bin:/usr/games:/bin:/usr/bin:/usr/local/bin:/local/bin:/local/X11/bin:/local/gnu/bin:/site/gmt/bin:/site/pgi/linux86/bin:/local/etc:/site/common/hosts:.:/mn/marduk/ansatte-u1/karstent/bin:/site/bin:/local/X11/bin:/local/bin:/local/gnu/bin:/local/sbin:/usr/bin/X11:/usr/X11R6/bin:/usr/bin:/bin:/usr/games:."
  IMAGEPATH = ".:/work/local/share/octave/2.1.69/imagelib//"
  INFO_FILE = "/work/local/info/octave.info"
  INFO_PROGRAM = "info"
  LOADPATH = ":~/octave//"
  PAGER = "/site/bin/less"
  PS1 = "\\s:\\#> "
  PS2 = "> "
  PS4 = "+ "
  automatic_replot = 1
  beep_on_error = 0
  completion_append_char = " "
  crash_dumps_octave_core = 1
  default_save_format = "ascii"
  echo_executing_commands = 0
  fixed_point_format = 0
  gnuplot_binary = "gnuplot"
  gnuplot_command_end = "\n"
  gnuplot_command_plot = "pl"
  gnuplot_command_replot = "rep"
  gnuplot_command_splot = "sp"
  gnuplot_command_title = "t"
  gnuplot_command_using = "u"
  gnuplot_command_with = "w"
  gnuplot_has_frames = 1
  history_file = "/mn/marduk/ansatte-u1/karstent/.octave_hist"
  history_size = 1024
  ignore_function_time_stamp = "system"
  max_recursion_depth = 256
  output_max_field_width = 10
  output_precision = 5
  page_output_immediately = 0
  page_screen_output = 1
  print_answer_id_name = 1
  print_empty_dimensions = 1
  print_rhs_assign_val = 0
# return_last_computed_value = <no value or error in displaying it>
  save_precision = 15
  saving_history = 1
  sighup_dumps_octave_core = 1
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  silent_functions = 0
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  string_fill_char = " "
  struct_levels_to_print = 2
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  warn_assign_as_truth_value = 1
  warn_divide_by_zero = 1
  warn_empty_list_elements = 0
  warn_fortran_indexing = 0
  warn_function_name_clash = 1
  warn_future_time_stamp = 1
  warn_imag_to_real = 0
  warn_missing_semicolon = 0
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  warn_num_to_str = 1
  warn_resize_on_range_error = 0
  warn_separator_insert = 0
  warn_single_quote_string = 0
  warn_str_to_num = 0
  warn_undefined_return_values = 1
  warn_variable_switch_label = 0



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