Recently I updated my R and Rstudio and tried to install tree package, but don't see it.
I am looking for help. The error message is given below.
(as ‘lib’ is unspecified)
Warning in install.packages :
package ‘tree’ is not available (for R version 3.5.3)
I have tried on two computers via both R console using install.packages("tree") and Rstudio package install, neither of them found tree packages on neither of computers. Your help will be very much appreciated.