Go Read About R’s Function Call Semantics

This is the sort of thing you don’t realize until it would be really useful to access the name of a variable or run text as if it were code. I think the most accessible example of R’s wizardry is in plotting- you pass variables (time, mv) to plot or ggplot instead of strings (“time”, “mv”) and magically you get axis labels. R gets access to the value of a variable and its name and no one notices because it just works.