jupyter-client has to be installed but “jupyter kernelspec --version” exited with code 127

Question

I have already installed Jupyter notebook in my ubuntu 16.04 machine. In jupyter notebook there is by default python installed. Now I want to use R from jupyter notebook.

Answer 1

For mac users:

I came across the same problem. You should call IRkernel::installspec(user = FALSE) in the terminal through R. I solved it this way, and I bet you could do the same:

1. Call R.home() in R console
2. You shall get [1] "/Library/Frameworks/R.framework/Resources"
3. Add /bin/R to path nlike this: /Library/Frameworks/R.framework/Resources/bin/R
4. In terminal, paste this path /Library/Frameworks/R.framework/Resources/bin/Rand enter.
5. Now you are using R in terminal. CallIRkernel::installspec(user = FALSE) And it shall be solved then.