.vimrc里怎么样设置变量啊？比如。。。

albertkong

set the    Tlist_Ctags_Cmd variable to point to the location of the exuberant ctags
utility (not to the directory) in the .vimrc file.

请问这个要怎么样设啊？
偶set Tlist_Ctags_Cmd="e:\ctags\ctags.exe"这样写不对。。。请问？