Creating a comma separated vector

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shQuote is probably the best way to do this. Specifically, this gets you the output you want:

cat(paste(shQuote(one, type="cmd"), collapse=", "))

If single quotes are fine, you can use:

paste(shQuote(one), collapse=", ")

type="cmd" actually provides escaped quotes, which is what’s actually useful for most contexts, but if you really want to display it somewhere with unescaped quotes, cat provides that.

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