Octave installation on iMac

[Ronald Francis]

I have installed Octave, Gnuplot, the latest X11, and yet I receive a message 
saying that Gnuplot must be installed.  They are all in 'Applications'.  What 
am I missing?  I have tried everything I can think of.  Please hep!

Octave response is:

dyld: Library not loaded: /usr/Xdyld: Library not loaded: 
/usr/X11/lib/libfreetype.6.dylib
  Referenced from: /usr/X11R6/lib/libfontconfig.1.dylib
  Reason: Incompatible library version: libfontconfig.1.dylib requires version 
13.0.0 or later, but libfreetype.6.dylib provides version 10.0.0
11/lib/libfreetype.6.dylib
  Referenced from: /usr/X11R6/lib/libfontconfig.1.dylib
  Reason: Incompatible library version: libfontconfig.1.dylib requires version 
13.0.0 or later, but libfreetype.6.dylib provides version 10.0.0
/Applications/Gnuplot.app/Contents/Resources/bin/gnuplot: line 71:  3570 
Trace/BPT trap          GNUTERM="${GNUTERM}" GNUPLOT_HOME="${GNUPLOT_HOME}" 
PATH="${PATH}" DYLD_LIBRARY_PATH="${DYLD_LIBRARY_PATH}" HOME="${HOME}" 
GNUHELP="${GNUHELP}" DYLD_FRAMEWORK_PATH="${DYLD_FRAMEWORK_PATH}" 
GNUPLOT_PS_DIR="${GNUPLOT_PS_DIR}" DISPLAY="${DISPLAY}" 
GNUPLOT_DRIVER_DIR="${GNUPLOT_DRIVER_DIR}" "${ROOT}/bin/gnuplot-4.2.6" "$@"
/Applications/Gnuplot.app/Contents/Resources/bin/gnuplot: line 71:  3576 
Trace/BPT trap          GNUTERM="${GNUTERM}" GNUPLOT_HOME="${GNUPLOT_HOME}" 
PATH="${PATH}" DYLD_LIBRARY_PATH="${DYLD_LIBRARY_PATH}" HOME="${HOME}" 
GNUHELP="${GNUHELP}" DYLD_FRAMEWORK_PATH="${DYLD_FRAMEWORK_PATH}" 
GNUPLOT_PS_DIR="${GNUPLOT_PS_DIR}" DISPLAY="${DISPLAY}" 
GNUPLOT_DRIVER_DIR="${GNUPLOT_DRIVER_DIR}" "${ROOT}/bin/gnuplot-4.2.6" "$@"
error: you must have gnuplot installed to display graphics; if you have gnuplot 
installed in a non-standard location, see the 'gnuplot_binary' function