covid19_preprints

Version 58 2021-12-16, 19:36

Version 57 2021-12-16, 19:35

Version 56 2021-09-17, 19:34

Version 55 2021-09-07, 12:44

Version 54 2021-08-20, 13:34

Version 53 2021-08-04, 14:12

Version 52 2021-08-04, 14:11

Version 51 2021-08-04, 14:10

Version 50 2021-08-04, 13:03

Version 49 2021-08-04, 13:01

Version 48 2021-08-04, 13:00

Version 47 2021-05-05, 09:00

Version 46 2021-04-02, 20:38

Version 45 2021-04-02, 20:37

Version 44 2021-04-02, 20:36

Version 43 2021-03-09, 14:40

Version 42 2021-02-08, 12:10

Version 41 2021-01-15, 17:33

Version 40 2020-12-16, 09:17

Version 39 2020-11-23, 14:42

software

posted on 2020-04-16, 14:05 authored by Nicholas FraserNicholas Fraser

This repository contains code used to extract details of preprints related to COVID-19 and visualize their distribution over time.

Preprint data is harvested from Crossref and arXiv using the R packages rcrossref and aRxiv, respectively.

With respect to Crossref, all records defined as "posted-content" are harvested using the cr_types function of the rcrossref package, and filtered for partial matches to keywords relating to COVID-19 ("coronavirus", "covid-19", "sars-cov", "ncov-2019", "2019-ncov") in either their titles or abstracts. The institution, publisher and group-title properties are then used to match preprints to relevant preprint repositories. In some cases, multiple Crossref records are registered for a single preprint (e.g. ChemRxiv registers a new Crossref record for each new version of a preprint). In these cases, only the earliest posted version is included in this dataset. Additionally, some preprints are deposited to multiple preprint repositories - in these cases both preprint records are included.

With respect to arXiv, records are harvested by searching directly (using the arxiv_search function of the aRxiv package) for COVID-19 related keywords in titles or abstracts.