> library(swirl)
Error in library(swirl) : there is no package called 'swirl'
官方给出的在我电脑上然并卵的解决方案
Did you install swirl with install.packages(“swirl”)? If so, then something went wrong with installation. There are a few reasons this might occur. 是否安装swirl包，如果没有请正确安装；
Do you have R version 3.0.2 or later? This is required for the most recent version of swirl. 确保R版本在3.0.2以上；
Are you behind a firewall or proxy server at work? If you have access to a personal computer, that’s often the easiest fix. 关闭防火墙，也可能是网络代理问题，或者如校园网，公司内网等可能造成问题；
Do you have full permissions on your computer? Again, using a personal computer may be your best bet. 电脑权限问题；
