Upgrade packages in R

When unable to upgrade packages as they are already loaded, check "package" panel and uncheck loaded ones.

Unchecking the mark is equal to the command "detach("package:RMySQL", unload=TRUE)".
Do same for "DBI".
*Note: Skip "restart R session before upgrade" as it will bring back unloaded packages.

R_proj$cat ~/.Rprofile 

source( "~/R_proj/startup.R" )

R_proj$cat ~/R_proj/startup.R

library(xts)

library(quantmod)

library(vars)

library(mondate)

# library(RMySQL) #junbi

library(forecast)

library(beepr)

Don't forget to comment and uncomment packages in initial start files as required.