过程入口点错误

Question

我正在尝试下载程序包但不断收到此错误。有人有经验吗？

install.packages(c("devtools","rstudioapi"), dependencies=TRUE, repos=c("http://rstudio.org/_packages", "http://cran.rstudio.com"))

devtools::install_github(repo = "dadrivr/ffanalytics")

install.packages(c("devtools", "rstudioapi", "shiny", "miniUI", "data.table", "stringr", "DT", "XML", "httr", "tcltk", "RCurl", "Hmisc", "readxl", "RSelenium"), dependencies=TRUE, repos=c("http://rstudio.org/_packages", "http://cran.rstudio.com"))

library("ffanalytics"])