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

isRegular {timeDate} | R Documentation

## Checks if a date/time vector is regular

### Description

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.

### Usage

    ## S4 method for signature 'timeDate'
    isDaily(x)
    ## S4 method for signature 'timeDate'
    isMonthly(x)
    ## S4 method for signature 'timeDate'
    isQuarterly(x)

    ## S4 method for signature 'timeDate'
    isRegular(x)

    ## S4 method for signature '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

    ## None

[Package timeDate version 3043.102 Index]