I have installed R and when I try to open it I get this error:
“error while loading shared libraries: libicuuc.so.74: cannot open shared object file: No such file or directory”
I’m not a very experienced person in Manjaro, so if anyone can help me I would greatly appreciate it 
Is the system fully updated? If not, update your system. The software is looking for icu 74.2-1 which is current in all branches.
I am curious. What is R?
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Looks like the icu or lib32-icu are not installed.
Just enter the following and (re-) install the packages: sudo pacman -Syu icu lib32-icu
Source: https://stackoverflow.com/questions/57214330/error-while-loading-shared-libraries-libicuuc-so-50
Have yout tried
sudo pacman -Syu r
to install it?
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It’s a programming language.
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It could be The R Project for Statistical Computing software;
or the R programming language itself.
There’s also RStudio, that some people just refer to as R.
This has been brought to you today by the letter, R.
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Or both. 
extra/r 4.3.2-3
Language and environment for statistical computing and graphics
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