tfwindow {tframe} | R Documentation |
Truncate a time series object to a time window.
tfwindow(x, ...) tfwindow(x, start.=NULL, end.=NULL, tf=NULL, warn=T) tfwindow(x, start.=NULL, end.=NULL, warn=T, eps=.Options$ts.eps)
x |
A time series object. |
start. |
A start date of a format compatible with the time series |
end. |
An end date of a format compatible with the time series |
tf |
A tframe or tframed object |
warn |
A logical indicating if warning should be produced |
If start.
or end.
are omitted and tf
is specified then the
start or end is taken from the tf
object.
This function calls window but makes more effort to preserve series.names
if the x
has them.
It also supports the optional argument warn
to suppress
warning messages. Frequently it is convenient to write code which always
truncates to a window without first checking if the data is already within
the window. Since window produces a warning in this situation, the optional
argument is frequently useful when tfwindow is used by other code.
A time series object similar to x, but typically spanning a shorter time period.
tfwindow(ts(matrix(rnorm(24),24,1), start=c(1980,1), frequency=4), start=c(1982,2))