This short video explains how SCImago Journal Rank (SJR) and Source Normalized Impact per Paper (SNIP) are calculated. Scopus uses SJR and SNIP for journal comparisons. Click anywhere on the image to start the video. This video requires Flash. iPad/iPhone users should view the Journal Metrics in Scopus page, linked below:
SNP and SJR cover for around 18,000 journals containing peer-reviewed articles and are updated twice a year. In order to more accurately measure the impact of journals included in Scopus, in the fall, 2012, SNIP and SJR ) journal metrics were modified and the values for the years 1999-2011 (2011 full year included) have been updated.
Scopus's journal analyzer allows you to select and compare journals according to impact metrics, citations, and other parameters.
Up to 10 Journals can be compared in a chart or table.