添加tm和wordcloud安装包的过程中一直提示找不到rcpp，然后安装rcpp又一直失败
install.packages("Rcpp")
试开URL’https://cran.stat.unipd.it/bin/macosx/contrib/4.1/Rcpp_1.0.8.3.tgz'
Content type 'application/octet-stream' length 3320132 bytes (3.2 MB)
downloaded 959 KB
Warning in install.packages :
downloaded length 982780 != reported length 3320132
Warning in install.packages :
URL 'https://cran.stat.unipd.it/bin/macosx/contrib/4.1/Rcpp_1.0.8.3.tgz': Timeout of 60 seconds was reached
Error in download.file(url, destfile, method, mode = "wb", ...) :
download from 'https://cran.stat.unipd.it/bin/macosx/contrib/4.1/Rcpp_1.0.8.3.tgz' failed
Warning in install.packages :
download of package ‘Rcpp’ failed
已经尝试了install.packages("Rcpp",type="binary")，没有效果
希望可以在mac电脑的r语言安装rcpp