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 0.5-2.1 Index]