Clean a DOI vector

This helper cleans DOIs (Digital Object Identifier) by removing prefix (doi:, https://doi.org/ and http://dx.doi.org/) and using lower case.

Usage

fp_clean_doi(doi = NULL)

Arguments

doi

a character vector with Digital Object Identifiers (DOI).

Value

A character of DOI without prefix and in lower case.

Examples

dois <- c(
  "10.1098/rsos.160384",
  "10.1098/RSOS.160384",
  "doi: 10.1098/rsos.160384",
  "http://dx.doi.org/10.1098/rsos.160384",
  "https://doi.org/10.1098/rsos.160384",
  "HTTPS://DOI.ORG/10.1098/RSOS.160384",
  NA
)

fp_clean_doi(dois)
#> [1] "10.1098/rsos.160384" "10.1098/rsos.160384" "10.1098/rsos.160384"
#> [4] "10.1098/rsos.160384" "10.1098/rsos.160384" "10.1098/rsos.160384"
#> [7] NA