tsp
Tsp Attribute of TimeSerieslike Objects
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.
 Keywords
 ts
Usage
tsp(x)
tsp(x) < value
hasTsp(x)
Arguments
 x
 a vector or matrix or univariate or multivariate timeseries.
 value
 a numeric vector of length 3 or
NULL
.
Details
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.\ifelse{latex}{\out{~}}{ } 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
.
Value

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)
.
References
Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.
See Also
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