Dear BUGSlist,
I am attempting to perform a simulation using a number of parallel chains
with unique seed values for each chain. Experience indicates that this is
necessary to prevent coupling between chains, a problem that is mentioned
in a previous version of the BUGS manual. It was also suggested that the
seed value can be set in the 'initial value file'. But this now appears to
cause an 'undefined variable' error. I notice item 001835 (seed for
parallel chain) in the BUGS list is concerned with this issue, but I don't
see any response. I am attempting to run the simulations using the script
facility, and I notice that seed initialisation has been discussed in the
'wish list' context. I am unsure how parallel chains are seeded when run
from a script file.
I realise that by running each chain separately, and by executing the
script statements in sections, it is possible to set the seed for each
chain, as required after compilation. Is it possible to do this all within
a single parallel chain script run?
Many thanks in advance,
Martin King
***************
Martin King
Biophysics, Radiology & Physics Unit
Institute of Child Health/Great Ormond Street Hospital for Children
30 Guilford Street
London WC1N 1EH, UK
tel: + 44 (0)20 7905 2708
fax: + 44 (0)20 7905 2358
email: [log in to unmask]
-------------------------------------------------------------------
This list is for discussion of modelling issues and the BUGS software.
For help with crashes and error messages, first mail [log in to unmask]
To mail the BUGS list, mail to [log in to unmask]
Before mailing, please check the archive at www.jiscmail.ac.uk/lists/bugs.html
Please do not mail attachments to the list.
To leave the BUGS list, send LEAVE BUGS to [log in to unmask]
If this fails, mail [log in to unmask], NOT the whole list
|