我想安装gganimate，但是当我在公司设置中的防火墙后面工作时，install_github不是一个选项，因为它返回：
install_github("dgrtwo/gganimate")
Error in curl::curl_fetch_disk(url, x$path, handle = handle) :
Couldn't resolve host nam
我试图手动安装它，但我得到的结果是：
install.packages("C:/Users/stefanj/Downloads/gganimate.zip", repos = NULL, type = "win.binary")
Installing package into ‘C:/Users/stefanj/Documents/R/win-library/3.3’
(as ‘lib’ is unspecified)
Warning in install.packages :
cannot open compressed file 'gganimate/DESCRIPTION', probable reason 'No such file or directory'
Error in install.packages : cannot open the connection
我找到了另一个库（rCharts）的解决方法：
library(downloader)
download("https://github.com/ramnathv/rCharts/archive/master.tar.gz", "rCharts.tar.gz")
install.packages("rCharts.tar.gz", repos = NULL, type = "source")
但我无法找到gganimate的tar.gz文件。我只有一个zip文件。任何人都知道如何从zip安装源或我可以找到gganimate的actuall tar.gz文件？
我试过了
install.packages("gganimate.zip", repos = NULL, type = "source")
但失败了。