install.packages("cvTools", repos='http://cran.us.r-project.org')
install.packages("irr", repos='http://cran.us.r-project.org')
install.packages("text2vec", repos='http://cran.us.r-project.org’) 
install.packages("lsa", repos='http://cran.us.r-project.org’) 
install.packages("readr", repos='http://cran.us.r-project.org’)