when i input this i keep getting an error saying "Error in setwd("This Pc/Downloads/NMC_5_0)") :
cannot change working directory." However, I cannot imagine why. I have never set the wd, and I only downloaded the R Studio software two days ago.
Setting the working directory is a basic R task that everybody should be able to do.
I can think of many situations in which you want to do so, and not necessarily just because you may not use RStudio projects.
cheers