R: Breakdates Corresponding to Breakpoints

breakdates {strucchange} | R Documentation

## Breakdates Corresponding to Breakpoints

### Description

A generic function for computing the breakdates corresponding to breakpoints (and their confidence intervals).

### Usage

    breakdates(obj, format.times = FALSE, ...)

### Arguments

`obj` | An object of class `"breakpoints"`, `"breakpointsfull"` or their confidence intervals as returned by `confint`.
`format.times` | logical. If set to `TRUE` a vector of strings with the formatted breakdates. See details for more information.
`...` | currently not used.

### Details

Breakpoints are the number of observations that are the last in one segment and breakdates are the corresponding points on the underlying time scale. The breakdates can be formatted which enhances readability in particular for quarterly or monthly time series. For example the breakdate `2002.75` of a monthly time series will be formatted to `"2002(10)"`.

### Value

A vector or matrix containing the breakdates.

### See Also

`breakpoints`, `confint`

### Examples

    ## Nile data with one breakpoint: the annual flows drop in 1898
    ## because the first Ashwan dam was built
    data("Nile")
    plot(Nile)

    bp.nile <- breakpoints(Nile ~ 1)
    summary(bp.nile)
    plot(bp.nile)

    ## compute breakdates corresponding to the
    ## breakpoints of minimum BIC segmentation
    breakdates(bp.nile)

    ## confidence intervals
    ci.nile <- confint(bp.nile)
    breakdates(ci.nile)
    ci.nile

    plot(Nile)
    lines(ci.nile)

[Package strucchange version 1.5-2 Index]