You should really be asking Coursera for help with its course.
However you can figure this out by breaking down your commands
into small steps and seeing what each step gives. This is an advantage
of an interactive system like R. E.g., suppose you start with
> s1 <- data.frame(state=c("Rhode I
Hello,
I wonder if you might be able to help me. I'm enrolled in an R programming
course through Coursera. I've done well so far--though it's been
challenging!--but I'm having trouble understanding exactly how "split" and
the loop functions (like "lapply") work.
I keep getting an error that say
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