How many publications Europe PMC has for a query — europepmc

Asks for one row with resultType = "idlist", because only the count is wanted. Read the note in the file header: a count of 0 comes back as ok, not as no_data.

Usage

europepmc_count(query, ...)

Arguments

query: A query string. Build one with europepmc_query() to get the quoting right.
...: Passed to biohttp::get_json(), for example throttle.

Value

A biohttp envelope whose data is a list of count, query, and source_url.

References

Ferguson et al. (2021). Europe PMC in 2020. Nucleic Acids Research 49(D1), D1507-D1514. doi:10.1093/nar/gkaa994

Service documentation: https://europepmc.org/

Examples

# \donttest{
biohttp::body_or_null(europepmc_count(europepmc_query("NF1")))$count
#> [1] 38699
# }