R软件及其包的更新

方法一

move the packages from the old R installation into the new version; on Mac OSX, this means moving all folders from here:

/Library/Frameworks/R.framework/Versions/2.15/Resources/library
to here:

/Library/Frameworks/R.framework/Versions/3.0/Resources/library
[where you’ll replace “2.15” and “3.0” with whatever versions you’re upgrading from and to. And only copy whatever packages aren’t already in the destination directory. i.e. don’t overwrite your new ‘base’ package with your old one - if you did, don’t worry, we’ll fix it in the next step anyway. If those paths don’t work for you, try using installed.packages() to find the proper pathnames.]
now you can update your packages by typing update.packages() in your RStudio console, and answering ‘y’ to all of the prompts.

update.packages(checkBuilt=TRUE)
class :
Version 7.3-7 installed in /Library/Frameworks/R.framework/Versions/3.0/Resources/library
Version 7.3-8 available at http://cran.rstudio.com
Update (y/N/c)? y
—etc—
finally, to reassure yourself that you have done everything, type these two commands in the RStudio console to see what you’ve got:
version
packageStatus()

方法二

采用包“installr”
install.packages(“installr”)；
require(installr)；

using the package:
updateR()