Dear, I just re-installed my R and R-studio (haven't used it for awhile so deleted and reinstalled the newest versions), I am keep facing the following problems:
C:\Users\Erin\Documents>
C:\Users\Erin\Documents>install.packages("survival")
'install.packages' is not recognized as an internal or external command,
operable program or batch file.
Could you please help me with this? Thank you.