Error with plotting function

[Grace Copplestone]

Currently using - Mac OS X 10.6.8, Octave 3.4.0, XCode 4

I receive the following error when I use the plot function. Any help would be much appreciated. I'm taking the Coursera Machine Learning course and need the plot functions for the course exercises. Thank you in advance for your help.

octave-3.4.0:1> x=[1,2]

x =

   1   2

octave-3.4.0:2> y=[3,4]

y =

   3   4

octave-3.4.0:3> plot(x,y)

dyld: Library not loaded: /usr/X11/lib/libfreetype.6.dylib

  Referenced from: /usr/X11/lib/libfontconfig.1.dylib

  Reason: Incompatible library version: libfontconfig.1.dylib requires version 14.0.0 or later, but libfreetype.6.dylib provides version 13.0.0

dyld: Library not loaded: /usr/X11/lib/libfreetype.6.dylib

  Referenced from: /usr/X11/lib/libfontconfig.1.dylib

  Reason: Incompatible library version: libfontconfig.1.dylib requires version 14.0.0 or later, but libfreetype.6.dylib provides version 13.0.0

/Applications/Gnuplot.app/Contents/Resources/bin/gnuplot: line 71: 44214 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}" "${ROOT}/bin/gnuplot-4.4.3" "$@"

/Applications/Gnuplot.app/Contents/Resources/bin/gnuplot: line 71: 44218 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}" "${ROOT}/bin/gnuplot-4.4.3" "$@"

warning: broken pipe -- some output may be lost

warning: broken pipe -- some output may be lost

warning: broken pipe -- some output may be lost

warning: broken pipe -- some output may be lost

warning: broken pipe -- some output may be lost

warning: broken pipe -- some output may be lost

warning: broken pipe -- some output may be lost

I've tried googling some solutions, I've copied the output of a request within on solution below.

address@hidden { /usr/X11/lib } 

$ ls -l /usr/X11/lib/libfreetype.6.dylib

-rwxr-xr-x  1 root  wheel  1653792  6 Dec  2011 /usr/X11/lib/libfreetype.6.dylib