units(x) ## S3 method for class 'difftime': units(x)units(x) <- value ## S3 method for class 'difftime': units(x) <- value
| x | a difftime object. | 
| value | a character string specifying the time unit, such as "secs", "mins", "hours", "days", and "weeks". | 
| units, units.difftime | returns the units attribute of x. | 
| units<-, units<-.difftime | returns a difftime object converted from x with value used as the time unit. | 
(dt <- as.difftime("01:00:00"))
units(dt)
units(dt) <- "secs"; dt
units(dt)