mac os x 10.8 mountain lion下octave调用gnuplot的问题

最近在看coursera上的machine learning，但是装了octave和gnuplot之后提示：

octave-3.4.0:1> hist(w)
dyld: Library not loaded: /opt/X11/lib/libfreetype.6.dylib
Referenced from: /usr/X11/lib/libfontconfig.1.dylib
Reason: Incompatible library version: libfontconfig.1.dylib requires version 15.0.0 or later, but libfreetype.6.dylib provides version 13.0.0
dyld: Library not loaded: /opt/X11/lib/libfreetype.6.dylib
Referenced from: /usr/X11/lib/libfontconfig.1.dylib
Reason: Incompatible library version: libfontconfig.1.dylib requires version 15.0.0 or later, but libfreetype.6.dylib provides version 13.0.0
/Applications/Gnuplot.app/Contents/Resources/bin/gnuplot: line 71:  4296 Trace/BPT trap: 5       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:  4301 Trace/BPT trap: 5       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

起初是参考[1]中的方法，结果联系提示“warning: broken pipe -- some output may be lost”，后又找到参考[2]中的方法，试了之后仍旧提示warning。。想想可能是先前的环境变量的修改有问题。于是，有把[1]中提到的所有操作撤销了下。即

1. 将gnuplot.app中的script改回原来的

2. 删除 ~/.profile

3. 删除软连接：/Users/yourusername/bin

4. 移除环境变量(optional)

那么现在就可以了。

最佳方案

总结一下，如果一开始出问题的话，那么只需要简单进行如下修改

cd /Applications/Gnuplot.app/Contents/Resources/lib
mv libfreetype.6.dylib libfreetype.6.dylib.bak
ln -s /usr/X11/lib/libfreetype.6.dylib .

所有的所有的前提，是先安装XQuartz。

参考资料

[1] 在mac os X下安装gnuplot的步骤和方法 http://blog.csdn.net/kuzuozhou/article/details/6657606

[2] Mac OS X Mountain Lion, Octave can not execute sombrero() http://octave.1599824.n4.nabble.com/Mac-OS-X-Mountain-Lion-Octave-can-not-execute-sombrero-td4643502.html