Time Units of a Time Series
DESCRIPTION:
Returns the value of the attribute describing the units in which the time domain is measured for a time series.
USAGE: 
units(x)
REQUIRED ARGUMENTS:
x:
a univariate or multivariate time series.
VALUE:
a character string which is the units attribute of the tspar attribute of a regular (class "rts") or irregular (class"its") time series, or the component of the tspar attribute of a calendar time series (class "cts").
SEE ALSO:
cts , its , rts , tspar .
EXAMPLES: 
# the value of the units argument is returned
rts.ex <- rts(freeny.x, start = c(0,3), freq = 7, units = "weeks")
units(rts.ex)