Fig. 4
From: Changing word meanings in biomedical literature reveal pandemics and new technologies
A The number of change points increases over time in PMCOA. The x-axis shows the various time periods, while the y-axis depicts the number of detected changepoints. B Regarding preprints, the greatest number of change points was during 2018–2019. The x-axis shows the various time periods, while the y-axis depicts the number of detected change points. C The token ‘cas9’ was detected to have a changepoint between 2012 and 2013. The x-axis shows the time period since the first appearance of the token, and the y-axis shows the change metric. D ‘sars’ has two detected changepoints within the PMCOA corpus. The x-axis shows the time period since the first appearance of the token, and the y-axis shows the change metric