update.packages()执行后backports、Matrix及Tibble包仍未更新的问题咨询

Hey there, let's figure out why those three packages aren't updating even though update.packages() seemed to run. Here are the most common issues and fixes to try:

• Permission Restrictions
  If you installed R system-wide (not in a user-specific library), your regular user account might not have write access to the package directory.
  Fixes:

  1. Launch R/RStudio with administrator privileges (right-click > "Run as administrator" on Windows, or use sudo R on macOS/Linux).
  2. Or, update packages to your user-specific library instead:

     update.packages(ask = FALSE, lib = .libPaths()[2])
     

     The second entry in .libPaths() is usually your user library, which you have full permissions for.

• Outdated CRAN Mirror or Cache
  Sometimes the mirror you're using hasn't synced the latest package versions, or old.packages() is pulling from cached data.
  Fixes:

  1. Switch to a different, up-to-date CRAN mirror first:

     chooseCRANmirror() # Pick a mirror close to your location
     

  2. Force old.packages() to check for built versions (not just cached metadata):

     old.packages(checkBuilt = TRUE)
     

• Packages Are Loaded in the Current Session
  If backports, Matrix, or Tibble are currently loaded in your R session, update.packages() can't overwrite them (they're in use).
  Fix: Restart R completely (no packages loaded), then run update.packages(ask = FALSE) again.

• Dependency Conflicts
  These packages might rely on other outdated packages that are blocking the update.
  Fix: Update all dependencies alongside the packages:

  update.packages(dependencies = TRUE, ask = FALSE)
  

• R Version Compatibility
  Newer versions of these packages might require a newer R version than what you're running. For example, some recent Tibble versions need R 4.0+.
  Fix: First update your R installation to the latest stable release, then try updating the packages again.

Give these steps a try one by one—most likely it's a permission or loaded package issue that's easy to fix!

内容的提问来源于stack exchange，提问作者jonaden