tsp {stats} | R Documentation |
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)
x |
a vector or matrix or univariate or multivariate time-series. |
value |
a numeric vector of length 3 or |
The 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
.
An object which differs from 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)
.
Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.