joint_indicators_by_date
generates a dataframe joining the dates and values of 2 indicators
joint_indicators_by_date(date0, i0, date1, i1)
A dataframe with the following columns :
date: all dates presented in any of the indicators.
f: the values of the first indicator. We assign 0 in the case the data is not available for a given day.
g: the values of the second indicator. We assign 0 in the case the data is not available for a given day
the dates of the first indicator.
the values of the first indicator.
the dates of the second indicator.
the values of the second indicator.