python之ggplot2 不存在于 python 的 rpy2 中

我在 Python3.2 中使用 rpy2 v2.1.9，我不明白为什么我不能使用库 ggplot2

import rpy2 
from rpy2.robjects import r 
r.library("ggplot2") 

这是我得到的错误信息

Error in function (package, help, pos = 2, lib.loc = NULL, character.only = FALSE,  :  
  there is no package called 'ggplot2' 
Traceback (most recent call last): 
  File "<stdin>", line 1, in <module> 
  File "/usr/local/lib/python3.2/dist-packages/rpy2/robjects/functions.py", line 82, in __call__ 
     return super(SignatureTranslatedFunction, self).__call__(*args, **kwargs) 
   File "/usr/local/lib/python3.2/dist-packages/rpy2/robjects/functions.py", line 34, in __call__ 
     res = super(Function, self).__call__(*new_args, **new_kwargs) 
 rpy2.rinterface.RRuntimeError: Error in function (package, help, pos = 2, lib.loc = NULL, character.only = FALSE,  :  
   there is no package called 'ggplot2' 

请您参考如下方法:

查看第一条错误信息的尾部:

there is no package called 'ggplot2'

您需要先安装ggplot2 包。启动 R 本身，然后说

 install.packages("ggplot2")