R パッケージがインストールできないときの対策

問題：Rのパッケージがインストールできない

詳細　Rターミナル：

> install.packages(plyr)
Error in install.packages(plyr) : object 'plyr' not found

（ここでGUI設定から"Install"へ）

trying URL 'http://cran.ism.ac.jp/bin/macosx/mavericks/contrib/3.2/plyr_1.8.3.tgz'
Content type 'application/x-gzip' length 804791 bytes (785 KB)
==================================================
downloaded 785 KB

tar: Failed to set default locale

The downloaded binary packages are in
/var/folders/g_/tbmcnbwn6dd1y3crc7v2_ttr0000gn/T//Rtmp8ey8GN/downloaded_packages
> library(plyr)
Error in loadNamespace(j <- i1L, c(lib.loc, .libPaths()), versionCheck = vIj) :
there is no package called 'Rcpp'
Error: package or namespace load failed for 'plyr'

解決：""で区切る

> install.packages("plyr")
also installing the dependency 'Rcpp'

trying URL 'http://cran.ism.ac.jp/bin/macosx/mavericks/contrib/3.2/Rcpp_0.11.6.tgz'
Content type 'application/x-gzip' length 2931294 bytes (2.8 MB)
==================================================
downloaded 2.8 MB

tar: Failed to set default locale
tar: Failed to set default locale

The downloaded binary packages are in
/var/folders/g_/tbmcnbwn6dd1y3crc7v2_ttr0000gn/T//Rtmp8ey8GN/downloaded_packages