WARNING: Rtools is required to build R packages but is not currently installed. Please download and install the appropriate version of Rtools before proceeding: (unfortunatey I cannot seem to download any packages)...I try basic readxl...hit the "install" button; "install from: Repository(CRAN); packages "readxl" or readxl. Either results in unable t access index for repository.
Installing package into ‘C:/Users/Administrator/Documents/R/win-library/4.0’
(as ‘lib’ is unspecified)
Warning in install.packages :
'lib = "C:/Users/Administrator/Documents/R/win-library/4.0"' is not writable
Error in install.packages : unable to install packages---
another example: attempted to install dtplyr...
Error: package or namespace load failed for ‘dplyr’ in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]):
there is no package called ‘pillar’
In addition: Warning message:
package ‘dplyr’ was built under R version 4.0.5