Can't install package "userfriendlyscience"

Question

I need to download a package "userfriendlyscience" as it seems to be the only package which can perform a Games-Howell post-hoc test. However, when I try to install it I am unable to. I have tried 2 ways,

1. first by simply installing it and got the message:

   Warning in install.packages : installation of package ‘userfriendlyscience’ had non-zero exit status

2. I saw online it might help to install devtools first (which I did) then run devtools::install_github("matherion/userfriendlyscience", dependencies=FALSE). However this gave me the message:

   ERROR: dependencies ‘data.tree’, ‘DiagrammeR’ are not available for package ‘userfriendlyscience’

   • removing ‘/Library/Frameworks/R.framework/Versions/3.3/Resources/library/userfriendlyscience’ Installation failed: Command failed (1)

Thank you for any and all help :)

Answer 1

Have you tried installing dependencies

devtools::install_github("matherion/userfriendlyscience", dependencies=TRUE)