I believe I have followed the instructions on the relevant CRAN site to update R to the newest version (currently R 4.0.5) but with no luck.
I'm running
$ cat /etc/os-release
PRETTY_NAME="Raspbian GNU/Linux 10 (buster)"
with R version
$ R --version
R version 3.5.2 (2018-12-20) -- "Eggshell Igloo"
What I did is, first add repository to /etc/apt/sources.list
http://cloud.r-project.org/bin/linux/debian buster-cran40/
which currently looks like this:
deb http://raspbian.raspberrypi.org/raspbian/ buster main contrib non-free rpi
# Uncomment line below then 'apt-get update' to enable 'apt-get source'
#deb-src http://raspbian.raspberrypi.org/raspbian/ buster main contrib non-free rpi
deb http://cloud.r-project.org/bin/linux/debian buster-cran40/
Second, to fetch and import the current signing key:
$ sudo apt-key adv --keyserver keys.gnupg.net --recv-key 'E19F5F87128899B192B1A2C2AD5F960A256A04AF'
Third,
$ sudo apt update
$ sudo apt upgrade
Now I attempted to install, but that fails.
$ sudo apt-get install r-base r-base-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
r-base : Depends: r-base-core (>= 4.0.5-1~bustercran.0) but 3.5.2-1 is to be installed
Depends: r-recommended (= 4.0.5-1~bustercran.0) but it is not going to be installed
Recommends: r-base-html but it is not going to be installed
r-base-dev : Depends: r-base-core (>= 4.0.5-1~bustercran.0) but 3.5.2-1 is to be installed
E: Unable to correct problems, you have held broken packages.
To solve the issue I tried several things like fixing dependencies issue,
$ sudo apt-get autoremove
re-installing r-base-core,
$ sudo apt update
$ sudo apt remove r-base-core
$ sudo apt install r-base-core
and using the command at the CRAN site mentioned above.
$ sudo apt install -t buster-cran40 r-base
But I still have R version 3.5.2, i.e. I always get R 3.5.2 instead of R 4.0.5.
How do I get R 4.0.5 onto my Raspberry pi?
Edit
More infos:
$ apt search r-base-core
Sorting... Done
Full Text Search... Done
pandoc/stable 2.2.1-3+b2 armhf
general markup converter
r-base/buster-cran40 4.0.5-1~bustercran.0 all
GNU R statistical computation and graphics system
r-base-core/stable,now 3.5.2-1 armhf [installed]
GNU R core of statistical computation and graphics system
r-base-core-dbg/stable 3.5.2-1 armhf
GNU R debug symbols for statistical comp. language and environment
r-cran-date/stable 1.2.38-1+b1 armhf
GNU R package for date handling
