Sum POSIXct POSIXt values from a column
I have one data frame with more than 1000 rows, and I have one column duracao which I want to sum the values that have there HH:MM, and resulting also the value as HH:MM.
I have one data frame with more than 1000 rows, and I have one column duracao which I want to sum the values that have there HH:MM, and resulting also the value as HH:MM.