is_pubmed_id: Is a string a PubMed ID?
Description
Find which strings are valid PubMed IDs (returns TRUE). PubMed IDs are
tested against the following regular expression: ^\\d+$.
Usage
is_pubmed_id(str, convert_NA_to_FALSE = TRUE)
Arguments
- str
A character vector of strings.
- convert_NA_to_FALSE
Whether to treat NA as NA
(convert_NA_to_FALSE = FALSE) or whether to return FALSE when
an NA is found (convert_NA_to_FALSE = TRUE).