I want to generate a load of POSIXct dates. I want to have the time component only between 9am and 5pm and only at 15 minute blocks. I know how to generate the random POSIXct between certain dates but how do I specify the minute blocks and the time range. This is where I am at:
sample(seq(as.POSIXct('2013/01/01'), as.POSIXct('2017/05/01'), by="day"), 1000)