# isRegular

##### Checks if a date/time vector is regular

Checks if a date/time vector is regular. i.e. if it is a daily, a monthly, or a quarterly date/time vector. If the date/time vector is regular the frequency can determined calling the function frequency.

- Keywords
- chron

##### Usage

```
# S4 method for timeDate
isDaily(x)
# S4 method for timeDate
isMonthly(x)
# S4 method for timeDate
isQuarterly(x)
```# S4 method for timeDate
isRegular(x)

# S4 method for timeDate
frequency(x, …)

##### Arguments

- x
an R object of class

`timeDate`

.- …
arguments to be passed

##### Details

A date/time vector is defined as daily if the vector has not more than one date/time stamp per day.

A date/time vector is defined as monthly if the vector has not more than one date/time stamp per month.

A date/time vector is defined as quarterly if the vector has not more than one date/time stamp per quarter.

A monthly date/time vector is also a daily vector, a quarterly date/time vector is also a monthly vector.

A regular date/time vector is either a monthly or a quarterly vector.

NOT yet implemented is the case of weekly vectors.

##### Value

The `is*`

functions return `TRUE`

or `FALSE`

depending
on whether the date/time vector fulfills the condition or not.

The function frequency returns in general 1, for quarterly date/time vectors 4, and for monthly vectors 12.

##### Examples

```
# NOT RUN {
## None
# }
```

*Documentation reproduced from package timeDate, version 3043.102, License: GPL (>= 2)*