# isRegular

##### Checks if a time series is regular

Checks if a time series is regular.

- Keywords
- chron

##### Usage

```
"isDaily"(x)
"isMonthly"(x)
"isQuarterly"(x)
"isRegular"(x)
"frequency"(x, ...)
```

##### Arguments

- x
- an R object of class 'timeSeries'.
- ...
- arguments to be passed.

##### Details

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.

##### Value

- 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.##### Examples

`library(timeSeries)`

```
## None
```

*Documentation reproduced from package timeSeries, version 3022.101.2, License: GPL (>= 2)*