Function for getting access statistics for wikipedia pages
wp_trend(page, from = prev_month_start(), to = prev_month_end(),
lang = "en", file = "")The name of the Wikipedia page as to be found in the URL to the
wikipedia article. If e.g. the URL is:
https://en.wikipedia.org/wiki/Peter_Fox_(musician), than the page
name equals to Peter_Fox_(musician).
The starting date of the timespan for which access statistics should be retrieved - note that there is no data prior to 2007-12-01. Supply some sort of timestamp e.g. of class POSIXlt, POSIXct, Date, or character. If the option is of type character it should be in the form of yyyy-mm-dd.
The last date for which access statistics should be retrieved. Supply some sort of timestamp e.g. of class POSIXlt, POSIXct, Date, or character. If the option is of type character it should be in the form of yyyy-mm-dd.
The language shorthand identifying which Wikipedia access
statistics are to be used: e.g. "en" for the English version found
at https://en.wikipedia.org, "de" for the German version found at
https://de.wikipedia.org or perhaps "als" for the Alemannic dialect
found under https://als.wikipedia.org/.
Where to store data retrieved by function call? The data is stored in CSV format. If an already existing file is used for storage, the old data will not be deleted but instead new data will be added to this file! The cache in memory before the function call will be saved and restored afterwards. If you prefer automatic mirroring of in memory cache and cache on disk