Hi I’m very new to R and am trying to analyse a data-frame. one Column in the data-frame is a time-stamp. {the format being hour-minute-second-millisecond (or as an example 00:08:02.654) I want to be able to convert this so I can then say something like “between this time and 1 hour earlier how much was bought” (the “how much being bought will be in the data as non-equal time periods).
Any thoughts on where to begin – i’ve hit a brick wall…