Resamples dates and columns to end-of-business period frequency. Each period takes the last observation that falls on a business day within that period.
Sorted array of date strings
Value columns (same length as dates)
WE (week-end), ME (month-end), QE (quarter-end), YE (year-end)
Country code(s) for holiday filtering
Resamples dates and columns to end-of-business period frequency. Each period takes the last observation that falls on a business day within that period.