how to reinstall R kernel on jupyter notebook

Question

I used to have R kernel on my jupyter. I removed it then then tried to install again. I did:

install.packages(c('repr', 'IRdisplay', 'evaluate', 'crayon', 'pbdZMQ', 'devtools', 'uuid', 'digest'))
devtools::install_github('IRkernel/IRkernel')
IRkernel::installspec()

I got the error message below:

Error in IRkernel::installspec() : 
  jupyter-client has to be installed but “jupyter kernelspec --version” exited with code 127.

I have no clue what happened. I googled but found no answer... Appreciate it if anyone can help me with that. Thank you in advance.

oNgStrIng · Accepted Answer · 2017-05-20 02:18:12Z

1

I met the same problem.

It seemed that it was caused by the missing of some packages. Notice the information listed during the following step:

install.packages(c('repr', 'IRdisplay', 'evaluate', 'crayon', 'pbdZMQ', 'devtools', 'uuid', 'digest'))

In my case (just in my case), it showed that

At first, I didn't pay any attention to this warning and met the same problem as you met. Then I tried to fix it by installing the package and it worked.

I hope this experience will be helpful for you.

answered May 20, 2017 at 2:18

oNgStrIng

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