timeDate (version 2120.90)

isRegular: 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

## S3 method for class 'timeDate':
isDaily(x)
## S3 method for class 'timeDate':
isMonthly(x)
## S3 method for class 'timeDate':
isQuarterly(x)
## S3 method for class 'timeDate':
isRegular(x)
## S3 method for class 'timeDate':
frequency(x, \dots)

Arguments

x

an R object of class timeDate.

...

arguments to be passed

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.

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.

Examples

## None