number_to_issn | R Documentation |
An ISSN is formatted as NNNN-NNNX, where N is a number, and X can be any number or character. If ISSNs are formatted differently, this can give errors when using a public API, so they can be reformatted with this function. A string with a different length will return NA.
number_to_issn(number)
number |
string of length 8 (often a number) |
ISSN-formatted string.
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