Positions of series Objects
Accesses the positions of series objects.
positions(object) <- value
the object for which to find positions.
the value to which to set the positions.
This function can also be used on the left side of an assignment
to set the positions of a series object.
returns the positions slot of object.
x <- signalSeries(pos=1:10, data=11:20)
positions(x) <- 11:20