uroot (version 1.4-1)

Mdates: Determine the Location in the Sample of a Date and vice versa

Description

This function determines the year and season to which a given observation in the sample is related to, and the location in the sample of a given time specified by the year and the season.

Usage

Mdates (wts, yso)

Arguments

wts

a univariate time series object.

yso

either a vector of length two indicating the year and season or a vector on length one indicating the location in the sample of an observation.

Value

• An object of class vdate-class.

See Also

stepdate-methods.

Examples

## Mdates
    data(AirPassengers)
    ## Which date is related to the 12th observation?
    out1 <- Mdates(AirPassengers, 12)
    out1
    out1@Myso
    ## Where is located the observation in 1959.2
    out2 <- Mdates(AirPassengers, c(1959,2))
    out2
    ## Beyond the sample.
    Mdates(AirPassengers, 150)
    Mdates(AirPassengers, c(1970,2))

    ## Which is the next date after the 12th observation?
    stepdate(as.vdate(AirPassengers, yso=12), step=1)