Rtwalk (version 1.8.0)

PlotHist: Plot a histogram of a

Description

Plot a histogram of the twalk MCMC output.

Usage

PlotHist( info, par=1, from=0, xlab=paste("Parameter", par), main="", ...)

Arguments

info

as returned from Runtwalk.

par

parameter number to plot.

from

iteration number to start ploting (from=0 begings at initialization point).

xlab

parameter passed to hist.

main

parameter passed to hist.

...

parameters passed to hist.

Value

hist object.

References

Christen JA and Fox C (2010). A general purpose sampling algorithm for continuous distributions (the t-walk)., Bayesian Analysis, 5 (2), 263-282. URL: http://ba.stat.cmu.edu/journal/2010/vol05/issue02/christen.pdf

See Also

Runtwalk For running the twalk.

Examples

#### We first load the twalk package:
library(Rtwalk)



#### A ver simple inline example, 4 independent normals N(0,1):
######        dimension,  num of it, -log of objective function besides a const, support,
info <- Runtwalk( dim=4,  Tr=1000,  Obj=function(x) { sum(x^2)/2 }, Supp=function(x) { TRUE },
	x0=runif(4, min=20, max=21), xp0=runif(4, min=20, max=21)) 
####  and two (intentionally bad) initial points

### One can plot some histograms:
PlotHist(info, par=3)