R: History for the breakpoint estimates

draw.history {segmented} | R Documentation

## History for the breakpoint estimates

### Description

Displays breakpoint iteration values for segmented fits.

### Usage

    draw.history(obj, term, ...)

### Arguments

`obj` | a segmented fit returned by any "segmented" method.
`term` | a character to mean the ‘segmented’ variable whose breakpoint values throughout iterations have to be displayed.
`...` | graphic parameters to be passed to `matplot()`.

### Details

For a given `term` in a segmented fit, `draw.history()` displays the different breakpoint values obtained during the estimating process, since the starting values up to the final ones. When bootstrap restarting is employed, `draw.history()` produces two plots, the values of objective function and the number of distinct solutions against the bootstrap replicates.

### Value

None.

### Author(s)

Vito M.R. Muggeo

### Examples

    data(stagnant)
    os<-segmented(lm(y~x,data=stagnant),seg.Z=~x,psi=-.8)
    draw.history(os) #diagnostics with boot restarting

    os<-segmented(lm(y~x,data=stagnant),seg.Z=~x,psi=-.8, control=seg.control(n.boot=0))
    draw.history(os) #diagnostics without boot restarting

[Package segmented version 0.5-3.0 Index]