problem in installation: install_github('ramnathv/rCharts@dev')

[marineecology]

Dear Sir,
Why do i receive installation failed:

require(devtools)
install_github('ramnathv/rCharts@dev')
Downloading GitHub repo ramnathv/rCharts@dev
from URL https://api.github.com/repos/ramnathv/rCharts/zipball/dev
Installing rCharts
"C:/PROGRA1/R/R-341.0/bin/i386/R" --no-site-file --no-environ --no-save
--no-restore --quiet CMD INSTALL
"C:/Users/Administrator/AppData/Local/Temp/Rtmp2ttr7A/devtools1604369e683a/ramnathv-rCharts-8d3fe35"
--library="C:/Program Files/R/R-3.4.0/library" --install-tests
installing source package 'rCharts' ...
** R
** inst
** preparing package for lazy loading
Error in loadNamespace(name) : there is no package called 'base64enc'
Error : unable to load R code in package 'rCharts'
ERROR: lazy loading failed for package 'rCharts'
removing 'C:/Program Files/R/R-3.4.0/library/rCharts'
restoring previous 'C:/Program Files/R/R-3.4.0/library/rCharts'
Installation failed: Command failed (1)
@marineecology

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[kaxtillo]

Hello!

Good Morning.

I would like to know how RMaps is for the Version 0.99.879 – © 2009-2016 RStudio, Inc.

I have problems

• install.packages("devtools")
  Installing package into 'D:/Documents/R/win-library/3.2'
  (as 'lib' is unspecified)

  There is a binary version available but the source version is later:
  binary source needs_compilation
  devtools 1.12.0 1.13.2 TRUE

  Binaries will be installed
  trying URL 'http://cran.rstudio.com/bin/windows/contrib/3.2/devtools_1.12.0.zip'
  Content type 'application/zip' length 432097 bytes (421 KB)
  downloaded 421 KB

package 'devtools' successfully unpacked and MD5 sums checked

The downloaded binary packages are in
C:\Users\fcastillo\AppData\Local\Temp\RtmpKaX5nY\downloaded_packages

install_github('ramnathv/rCharts@dev')
Error: could not find function "install_github"