If you have a matrix X and you want an mcmc.list object for 3 chains:
as.mcmc.list(lapply(as.data.frame(X), mcmc))
is one way.
Best,
Uwe Ligges
On 02.12.2015 03:47, Margaret Donald wrote:
---------- Forwarded message ----------
From: Margaret Donald <merricks.merri...@gmail.com>
Date: 1 December 2015 at 23:09
Subject: Re: [R] Converting a matrix to an mcmc object
To: Jim Lemon <drjimle...@gmail.com>
Thanks, Jim. It may well do, but I am struggling to see how to coerce a
matrix into three chains... I could reprogram the whole show run it in
WinBUGS or OpenBUGS and process the coda, but I would prefer not to.
Regards,
Margaret.
On 30 November 2015 at 17:31, Jim Lemon <drjimle...@gmail.com> wrote:
Hi Margaret,
Doesn't the "mcmc" function in the "coda" package create an mcmc object
from a matrix?
Jim
On Mon, Nov 30, 2015 at 9:44 AM, Margaret Donald <
merricks.merri...@gmail.com> wrote:
Dear List,
I am using R2jags and post process some mcmc objects to produce a new
object, which is currently a matrix, which replicates the shape of the
objects from which it is derived.
I want to produce a Gelman-Rubin graph from its (implied) three chains,
but
I need to coerce the matrix into an mcmc object if I am to use gelman.plot
or gelman.diag from the R-package "coda".
(The various mcmc functions in "coda" seem to work in the other
direction.....)
Regards,
Margaret Donald
--
Margaret Donald
Post Doctoral researcher
University of New South Wales
margaret.don...@unsw.edu.au
0405 834 550
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