Description Usage Arguments Value Author(s)
PubMed Central Trend plot
| 1 | 
| query | query terms | 
| period | period of query in the unit of year | 
| proportion | If TRUE, use query_hits/all_hits, otherwise use query_hits | 
ggplot object
guangchuang yu
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.