Checks if a time series is regular
Checks if a time series is regular.
## S4 method for signature 'timeSeries' isDaily(x) ## S4 method for signature 'timeSeries' isMonthly(x) ## S4 method for signature 'timeSeries' isQuarterly(x) ## S4 method for signature 'timeSeries' isRegular(x) ## S4 method for signature 'timeSeries' frequency(x, ...)
x |
an R object of class 'timeSeries'. |
... |
arguments to be passed. |
What is a regular time series? If a series is a daily, a monthly,
or a weekly time series then we speak of a regular series.
This can be tested calling the functions isDaily,
isMonthly, isQuarterly, or in general isRegular
If the series is regular then the frequency of the series can
be determined calling the function frequency.
A time series is defined as daily if the series has not more than
one date/time stamp per day.
A time series is defined as monthly if the series has not more than
one date/time stamp per month.
A time series is defined as quarterly if the series has not more than
one date/time stamp per quarter.
Note, amonthly series is also a daily series, a quarterly series is
alsona monthly series.
With these definitions a regular series is either a monthly or a
quarterly series.
NOT yet implemented is the case of weekly series.
The is* functions return TRUE or FALSE depending
on whether the series fulfills the condition or not.
The function frequency returns in general 1, for quarterly series 4, and for monthly series 12.
## None
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