---------- 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 >> >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide >> http://www.R-project.org/posting-guide.html >> and provide commented, minimal, self-contained, reproducible code. >> > > -- Margaret Donald Post Doctoral researcher University of New South Wales margaret.don...@unsw.edu.au 0405 834 550 Dear List, > I failed to make it to the help list. I have gone to the latest version of the r coda package, and fail to find any help there as to how to coerce a vector (15000) or a matrix (5000 x 3) into an mcmc object with a name (given by me) and having three chains. I can get a single chain, but I want three. I would appreciate an example of a matrix as described above and the code needed to turn it into an mcmc object. I could arduously produce coda files and import them, but that seems ridiculous. Regards Margaret Donald > > 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 [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
