使用R语言的export包的时候遇到的报错和解决办法

Warning in install.packages :
  package ‘export’ is not available for this version of R

A version of this package for your version of R might be available elsewhere,
see the ideas at
https://cran.r-project.org/doc/manuals/r-patched/R-admin.html#Installing-packages

devtools::install_github("tomwenseleers/export")

export::graph2ppt(p1,file="Rplot02.ppt",
                  width=12,
                  height=4)

Error in PPTX_(file, bg, width, height, offx = offx, offy = offy, pointsize = pointsize,  : 
  function 'Rcpp_precious_remove' not provided by package 'Rcpp'

install.packages("Rcpp")