使用Jupyter Notebook的R笔记本中的内核错误

Question

我想在jupyter笔记本中使用R.

我去了我的R shell跑了

install.packages(c('rzmq','repr','IRkernel','IRdisplay'),
             repos = c('http://irkernel.github.io/', getOption('repos')))
IRkernel::installspec()

然后我加载了我的ipython笔记本并使用现在可用的R扩展创建了一个新的笔记本.然而,当我访问笔记本时,我遇到了这个内核错误:

Traceback (most recent call last):
  File "C:\Users\Nina Kate\Anaconda3\lib\site-packages\IPython\html\base\handlers.py", line 394, in wrapper
    result = yield gen.maybe_future(method(self, *args, **kwargs))
  File "C:\Users\Nina Kate\Anaconda3\lib\site-packages\IPython\html\services\sessions\handlers.py", line 53, in     post
    model = sm.create_session(path=path, kernel_name=kernel_name)
  File "C:\Users\Nina Kate\Anaconda3\lib\site-packages\IPython\html\services\sessions\sessionmanager.py", line 66, in create_session
    kernel_name=kernel_name)
  File "C:\Users\Nina Kate\Anaconda3\lib\site-packages\IPython\html\services\kernels\kernelmanager.py", line 84, in start_kernel
    kernel_name=kernel_name, **kwargs)
  File "C:\Users\Nina Kate\Anaconda3\lib\site-packages\IPython\kernel\multikernelmanager.py", line 112, in start_kernel
km.start_kernel(**kwargs)
  File "C:\Users\Nina Kate\Anaconda3\lib\site-packages\IPython\kernel\manager.py", line 240, in start_kernel
**kw)
  File "C:\Users\Nina Kate\Anaconda3\lib\site-packages\IPython\kernel\manager.py", line 189, in _launch_kernel
return launch_kernel(kernel_cmd, **kw)
  File "C:\Users\Nina Kate\Anaconda3\lib\site-packages\IPython\kernel\launcher.py", line 202, in launch_kernel
proc = Popen(cmd, **kwargs)
  File "C:\Users\Nina Kate\Anaconda3\lib\subprocess.py", line 859, in __init__
restore_signals, start_new_session)
  File "C:\Users\Nina Kate\Anaconda3\lib\subprocess.py", line 1112, in _execute_child
startupinfo)
    FileNotFoundError: [WinError 2] The system cannot find the file specified

Answer 1

我在 Windows 7 中遇到了完全相同的错误。我将 R 添加到 PATH 环境变量中，并且能够在 shell 上运行它，但在 Jupyter 中仍然遇到内核错误。

当在系统范围内安装时，内核开始工作，使用：

IRkernel::installspec(user = FALSE)

而不是第一个安装选项：

IRkernel::installspec()

请注意，有必要设置两个参数：PATH 变量和 R 系统范围的安装。