How to fix "Kernel not found or was deleted" problem for R in Notebook

Question

When I open one notebook, choose the kernel "R" and wait for its preparation, it appears the following message.

As a result, I cannot use the R interactive notebook. Could anyone give me a clue?

Answer 1

You can install the IRkernel with:

install.packages("devtools")

devtools::install_github("IRkernel/IRkernel")

IRkernel::installspec()

Close and reopen the notebook and the R kernel should be available.

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