tsp
returns the tsp
attribute (or NULL
).
It is included for compatibility with S version 2. tsp<-
sets the tsp
attribute. hasTsp
ensures x
has a
tsp
attribute, by adding one if needed.tsp(x)
tsp(x) <- value
hasTsp(x)
NULL
.x
only in the tsp
attribute
(unless NULL
is assigned). hasTsp
adds, if needed, an attribute with a start time and
frequency of 1 and end time NROW(x)
.tsp
attribute gives the start time in time units,
the end time and the frequency (the number of observations per unit of
time, e.g. 12 for a monthly series). Assignments are checked for consistency. Assigning NULL
which removes the tsp
attribute
and any "ts"
(or "mts"
) class of x
.ts
, time
, start
.