I have Jupiter Notebook and it sees Python3 clearly. Then I installed R, installed IRkernel using this instruction but when I used the command
IRkernel::installspec(user = FALSE)
I got an error:
Error in IRkernel::installspec(user = FALSE) :
jupyter-client has to be installed but “jupyter kernelspec --version” exited with code 127.
In addition: Warning message:
In system2("jupyter", c("kernelspec", "--version"), FALSE, FALSE) :
'"jupyter"' not found
Please help me to understand where is the mistake? (Windows 10, Python3)