Problems trying to install package in R

问题

I am having problems trying to install the nnet package in R. The download seems to be ok, but when I load the library it states

namespace ‘nnet’ is imported by ‘car’, ‘effects’ so cannot be unloaded

In addition: Warning message:

package ‘nnet’ was built under R version 3.2.5

Error in library(nnet) : Package ‘nnet’ version 7.3.11 cannot be unloaded

I tried reading other topics which suggest using remove.packages on car and effects. However I tried this and I am still unable to install

Thanks for the help

回答1:

Try unloadNamespace('effects') before trying library(nnet).

来源：https://stackoverflow.com/questions/37031457/problems-trying-to-install-package-in-r