Obtain impact factor?

[JeffreySmithA]

I have a relatively large dataset at the paper level (so work ID). In the OpenAlex API documentation, it's possible to obtain the impact factor for every publication via "funder object" or "author object" with "2yr_mean_citedness" but using OA_fetch, I'm only able to search for publications with a certain impact factor, not obtain the impact factor of each publication.

Is this something that's possible with the R package. I tried searching previous questions and documentation but am still struggling. Sorry to be a nuissance!

[TimothyElder]

Impact factor is a measure that is applied to scientific journals. If you want to retrieve the impact factor for the journal a publication appears in you can use the development version of openalexR by installing from GitHub via this code (this came up in #124):

install.packages("remotes")
remotes::install_github("ropensci/openalexR")

The development version allows you to access the 2year mean citedness (impact factor), the h-index and i10 index for a journal from the summary_stats column from the source:

journal <- oa_fetch(identifier = "S1983995261")
journal$summary_stats

If you want to retrieve all the sources for all the articles in your dataset you can fetch on the so_id column of your articles data frame.

ids <- c("https://openalex.org/W2128728535", "https://openalex.org/W2149609916",
         "https://openalex.org/W2002799357", "https://openalex.org/W2118526609")

# fetch articles
articles <- oa_fetch(identifier = ids)

# fetch sources
journals <- oa_fetch(identifier = articles$so_id)

Fetching the journals from a vector of ids from a data frame of articles can sometimes lead to errors if the source id is an NA.

[trangdata]

Thank you so much for the clear answer @TimothyElder 💯 . I just wanted to chime in to say that our CRAN release last month v1.2.1 #160 should have this field in the source's summary_stats as well.

[JeffreySmithA]

Thanks again for being so patient/helpful!