R包的安装错误ERROR: dependency ‘plyr’ is not available for package ‘reshape2’

我在ubuntu14.04上安装ggplot2的时候出现一下错误：

ERROR: dependency ‘plyr’ is not available for package ‘reshape2’
* removing ‘/home/wq/R/x86_64-pc-linux-gnu-library/3.0/reshape2’
Warning in install.packages :
installation of package ‘reshape2’ had non-zero exit status
ERROR: dependency ‘plyr’ is not available for package ‘scales’
* removing ‘/home/wq/R/x86_64-pc-linux-gnu-library/3.0/scales’
Warning in install.packages :
installation of package ‘scales’ had non-zero exit status
ERROR: dependencies ‘plyr’, ‘reshape2’, ‘scales’ are not available for package ‘ggplot2’
* removing ‘/home/wq/R/x86_64-pc-linux-gnu-library/3.0/ggplot2’
Warning in install.packages :
installation of package ‘ggplot2’ had non-zero exit status

The downloaded source packages are in
‘/tmp/RtmpgbMDf6/downloaded_packages’

从头看，原来是plyr包没有安装，接下来安装plyr包，有

ERROR: dependency ‘plyr’ is not available for package ‘reshape2’
* removing ‘/home/wq/R/x86_64-pc-linux-gnu-library/3.0/reshape2’
Warning in install.packages :
installation of package ‘reshape2’ had non-zero exit status

The downloaded source packages are in
‘/tmp/RtmpgbMDf6/downloaded_packages’

最后我找到了解决办法，将包下载下来，然后自己安装。

去这个网站https://launchpad.net/ubuntu/vivid/+package/r-cran-plyr下载r-cran-plyr包，通过如下代码安装：

setwd("/path/where/I/downloaded/the/compressed/file")
install.packages("plyr", repos=NULL)

ggplot2就通过正常的安装（install.packages("ggplot2")就可以了