Could not find function "install_github"

[ktdesignbox]

I am new in R Studio. I tried to download the libraries, but this message showed up:

require(devtools)
Loading required package: devtools
Warning message:
In library(package, lib.loc = lib.loc, character.only = TRUE, logical.return = TRUE, :
there is no package called 租evtools・> install_github('ramnathv/rCharts')
Error: could not find function "install_github"

[ramnathv]

For some reason, devtools is not correctly installed on your machine. Can you run install.packages("devtools") and try the installation again?

[ktdesignbox]

• installing source package 'rCharts' ...
  ** R
  ** demo
  ** inst
  ** preparing package for lazy loading
  ** help
  *** installing help indices
  ** building package indices
  ** testing if installed package can be loaded
  *** arch - i386
  *** arch - x64
• DONE (rCharts)

Looks like it was ok this time. Thank you!

[ramnathv]

You are welcome.