我无法正确加载我的“rgl”库。为什么？

Question

我在R 0.99.491＆amp ;;中加载我的rgl库时遇到了这个问题。 Mac OS X 10_11_3。

  > library(rgl)
 Error : .onLoad failed in loadNamespace() for 'rgl', details:
 call: dyn.load(file, DLLpath = DLLpath, ...)
 error: unable to load shared object'/Library/Frameworks/R.framework/Versions/3.2/Resources/library/rgl/libs/rgl   .so':
 dlopen(/Library/Frameworks/R.framework/Versions/3.2/Resources/library/rgl/libs/rgl    .so, 6): Library not loaded: /opt/X11/lib/libGLU.1.dylib
 Referenced from: /Library/Frameworks/R.framework/Versions/3.2/Resources/library/rgl/libs/rgl.so
 Reason: image not found
 Error: package or namespace load failed for ‘rgl’

安装没问题。但没有加载。 Xcode也已安装。能帮我解决一下吗？

感谢。