add_holidays_short_term: Add holidays to the short-term series
Description
This function adds a dummy variable for holidays to the short-term data series. Information on the holidays is retrieved from "https://date.nager.at/api/v3/publicholidays/".
Usage
add_holidays_short_term(shortterm)
Value
The short-term series with an additional column of holiday dummies.
Arguments
shortterm
The short-term data series resulting from decompose_load_data