首先安装依赖包
yun install -y libfreetype6-dev libcurl4-openssl-dev libssl-dev libxml2-dev libnlopt-dev
安装pophelper包
# install pophelper package from GitHub
remotes::install_github('royfrancis/pophelper')
安装成功后加载pophelper包
# load library for use
library(pophelper)
详情可参考：https://www.royfrancis.com/pophelper/
