Please I am trying to install few of R studio packages but it been while I am not able to fix this problem. I have attached picture of my r output when i try to install packages here with. Thanks in advance for my suggestions and help.
Best
Deepak
I'm not sure when you tried to install the packages, but the source of error is the missing package "rlang". The output states that you could not install rlang, because it was only available in source form, and you have no C-compiler installed (usually done via Rtools.exe on Windows), so you could not install that package. However, I just checked CRAN (https://cran.r-project.org/web/packages/rlang/index.html) and rlang seems to be available as compiled binary now.
Try:
install.packages("rlang", dependencies = TRUE)
and then try to re-install the other packages. In most cases, you should add "dependencies = TRUE", to make sure that package dependencies are installed properly.
Daniel Lüdecke Thanks Daniel for your time to answer my question. Actually it was due to my old R version. I was able to install after updating my R and R-studio.
Thanks a lot.
Ok, glad it worked for you! Strange though, since rlang requires R (≥ 3.1.0), and your screenshot suggests you're using R >= 3.2.
Daniel Lüdecke Yes I was using R 3.2 but now updated it to R 3.5 which is latest one.
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