Check if R package is installed then load library

Question

Our R scripts are used on multiple users on multiple computers and hence there are deviations in which packages are installed on each computer. To ensure that each script wo

Answer 1

The following can be used:

check.and.install.Package<-function(package_name){
    if(!package_name%in%installed.packages()){
        install.packages(package_name)
    }
}

check.and.install.Package("RTextTools")
check.and.install.Package("e1071")