Dear R-helpers:

I am new to R and would like to seek your expert opinion on installation
tip. Many thanks in advance.
I want to update my R  to the newest  version and wonder the following two
questions:

Question 1:
How can I install R and its contributed packages in a way so when updating R
in the future, I do NOT need to
re-install contributed packages used by R of last version.

Question 2:
Is it an ok-practice to just install all the CRAN packages (i.e.,
install.packages(available.packages()[,1]) ). Does someone do so?
The reason I ask the second question is that if installing all available
packages does Not consume too much time (say less than 2 hours), too much
computer resource (I have big harddrive, so harddrive is probably not a
concern. I guess computing speed will not be affected but not sure...)
then, I do not need to bother Question 1 and will just install all available
packages when updating R.

Many Thanks in advance.

Merry Christmas!

-Sean

	[[alternative HTML version deleted]]

