The data in the graph below from Journal Citation Reports (JCR) shows the frequency with which items published in the year or two years prior were cited in the JCR data year; that is, it shows the components of the calculation of the Journal Impact Factor, in this case, for the journal Analytical Chemistry.
The x axis shows citation counts from 1 to 50, with an additional group on right hand limit of “>50”. The y-axis shows how many items had the x-value of citations in the JCR data year.
All journals are displayed on the same x-axis, allowing easy visual comparison of the “impact profile” of different journals. The y-axis scales to accommodate the difference in size between journals.
Need help navigating JCR metrics? Research Librarians can help you learn how to see what papers have the most influence on the impact factor for a journal, or how the impact factor is derived, or for an overview of the new release of Journal Citation Reports!