Functions

Properties

Types and Values

Object Hierarchy

    GObject
    ╰── NcmMPIJob
        ╰── NcmMPIJobMCMC

Description

This object is a subclass of NcmMPIJob, designed to implement an MPI job for evaluating the posterior at the proposal points during an MCMC run. It is utilized by NcmFitESMCMC to parallelize the evaluation of the posterior function. The job involves computing the posterior function and, if applicable, additional functions (e.g., derived quantities) at a specified point within the parameter space. Notably, the slave also receives the current point and the current value for the acceptance probability. Consequently, it decides whether to accept or reject the proposal point and only computes the additional functions if the proposal point is accepted.

The MPI job is implemented as a function that takes a vector consisting of the set parameters, the current value of the posterior function, the acceptance probability, and the jump probability as input. The function returns a vector with the first element being 1.0 if the proposal point is accepted and 0.0 otherwise. The next value is the value of the posterior function at the proposal point. The remaining values are the values of the additional functions at the proposal point.

Functions

NcmMPIJobMCMC *
ncm_mpi_job_mcmc_new (NcmFit *fit,
                      NcmObjArray *func_oa);

NcmMPIJobMCMC *
ncm_mpi_job_mcmc_ref (NcmMPIJobMCMC *mjmcmc);

void
ncm_mpi_job_mcmc_free (NcmMPIJobMCMC *mjmcmc);

void
ncm_mpi_job_mcmc_clear (NcmMPIJobMCMC **mjmcmc);

Types and Values

#define NCM_TYPE_MPI_JOB_MCMC (ncm_mpi_job_mcmc_get_type ())

typedef struct _NcmMPIJobMCMC NcmMPIJobMCMC;

Property Details

  “fit”                      NcmFit *

  “function-array”           NcmObjArray *