python - ggplot2 不存在于 python 的 rpy2 中？

Question

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'

Answer 1

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")