| freq : {freq_spec} 
Frequency into which DateArray must be converted.
Accepts any valid frequency specification (string or integer) relation : {“END”, “START”} (optional) 
Applies only when converting a lower frequency Date to a higher
frequency Date, or when converting a weekend Date to a business
frequency Date. Valid values are ‘START’ and ‘END’ (or just ‘S’ and
‘E’ for brevity if you wish). For example, if converting a monthly date to a daily date, specifying
‘START’ (‘END’) would result in the first (last) day in the month. |