[R] creating character vector

[nblarson]

The reason this doesn't work is because R thinks that in the command
as.character(c(first,second)) that first  and second are variables that
exist within the working environment.  Since they don't (I assume), R
doesn't know what to do with the command.  Using the quotes indicates to R
that you're specifying a character string type, instead of calling a
variable.

As other have said before, if you don't want to type in quotes, you could
just read in a text file in the methods they describe.

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