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Issue while installation of packages in R Studio
Title
Question
> install.packages("plyr")
Warning in install.packages :
  unable to access index for repository https://cran.rstudio.com/src/contrib:
  cannot open URL 'https://cran.rstudio.com/src/contrib/PACKAGES'
WARNING: Rtools is required to build R packages but is not currently installed. Please download and install the appropriate version of Rtools before proceeding:

https://cran.rstudio.com/bin/windows/Rtools/
Warning in install.packages :
  unable to access index for repository https://cran.rstudio.com/src/contrib:
  cannot open URL 'https://cran.rstudio.com/src/contrib/PACKAGES'
Warning in install.packages :
  package ‘plyr’ is not available (for R version 4.0.0)
Warning in install.packages :
  unable to access index for repository https://cran.rstudio.com/bin/windows/contrib/4.0:
  cannot open URL 'https://cran.rstudio.com/bin/windows/contrib/4.0/PACKAGES'


R Installing-R-and-RStudio-on-Windows 00-01 min 0-10 sec 27-04-20, 1:15 p.m. hodit.kgce@gmail.com

Answers:

Please follow the steps given here: https://community.rstudio.com/t/install-packages-unable-to-access-index-for-repository-try-disabling-secure-download-method-for-http/16578 
27-04-20, 9:37 p.m. sudhakarst


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