etirm::estep Class Reference

SWIG wrapper for EStepDiscrete object. More...

#include <swig_etirm.h>

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List of all members.

Public Member Functions
	estep (int_vector *ilist1=0)
	Initialize estep object.
	~estep ()
	Release memory allocated in constructor.
double	compute (bool compute_prior=TRUE, bool store_prior=FALSE, int_vector *ilist4=0)
	Calls mEStep->DoEStep to perform E-step.
estep_type *	GetEStep ()
	Returns EStepDiscrete object.
Private Attributes
estep_type *	mEStep
	EStepDiscrete object.
ItemVector *	mItems
	List of items used to initialize mEStep.

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Detailed Description

SWIG wrapper for EStepDiscrete object.

Definition at line 344 of file swig_etirm.h.

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Constructor & Destructor Documentation

etirm::estep::estep

(

int_vector *

itemno = 0

)

Initialize estep object.

Function Parameters

Parameters:

[in]

*itemno

Pointer to list of item numbers to use for computing examinee posteriors distribution in E-Step. If itemno = NUL, use all items (default).

Definition at line 380 of file swig_etirm.cpp.

References etirm::CheckRunInit(), etirm::gEtirmRun, etirm::SwigEtirmRun::items, etirm::ItemSubset(), etirm::SwigEtirmRun::latentDist, mEStep, and mItems.

  {
    CheckRunInit();

    if (itemno)
    {
      mItems = new ItemVector(ItemSubset(itemno,gEtirmRun->items,"new_estep"));

      mEStep = new estep_type(mItems->begin(), mItems->end(), gEtirmRun->latentDist);
    }
    else
    {
      mItems = 0;
      mEStep = new estep_type((gEtirmRun->items).begin(), (gEtirmRun->items).end(), gEtirmRun->latentDist);
    }
  }

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etirm::estep::~estep

(

)

Release memory allocated in constructor.

Definition at line 401 of file swig_etirm.cpp.

References mEStep, and mItems.

  {
    if (mItems)
      delete mItems;
    delete mEStep;
  }

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Member Function Documentation

double etirm::estep::compute	(	bool	compute_post = TRUE,
		bool	store_post = FALSE,
		int_vector *	estep_items = 0
	)

Calls mEStep->DoEStep to perform E-step.

Returns marginal loglikelihood of examinees' responses (sum over examinees of the marginal loglikelihood of an examinee's responses) plus sum of prior likelihoods over all item parameters. This is the value of the marginal posterior density that the EM algorithm is maximizing at the values of the item parameters computed in the last M-step.

Function Parameters

Parameters:

[in]	compute_post	Flag: If compute_post == TRUE, then compute posterior distributions for all examinees. If compute_post == FALSE, then use previously stored posteriors for examinees. (Default: TRUE).
[in]	store_post	Flag: If store_post == TRUE, then store the posterior distribution computed for each examinee. These posterior distributions are stored as part of the examinee objects. (Default: FALSE).
[in]	*estep_items	Pointer to list of items for which n and r are updated. If a null pointer is passed then n arnd r are updated for all items used in the E-step to compute examinee posterior distributions.

Definition at line 433 of file swig_etirm.cpp.

References etirm::SwigEtirmRun::CheckExaminees(), etirm::CheckRunInit(), etirm::EStepDiscrete< E, I, II, D >::DoEStep(), etirm::SwigEtirmRun::examinees, etirm::gEtirmRun, etirm::SwigEtirmRun::items, etirm::ItemSubset(), and mEStep.

  {
    const char *fname = "estep_compute";
    CheckRunInit();
    gEtirmRun->CheckExaminees(fname);

    if (estep_items)
    {
      if (estep_items->size() > 0)
      {
        ItemVector itemsub = ItemSubset(estep_items, gEtirmRun->items, fname);
        return mEStep->DoEStep((gEtirmRun->examinees).begin(), (gEtirmRun->examinees).end(), itemsub.begin(), itemsub.end(), compute_post, store_post);
      }
      else // do not update n and r for any items
      {
        return mEStep->DoEStep((gEtirmRun->examinees).begin(), (gEtirmRun->examinees).end(), (gEtirmRun->items).begin(), (gEtirmRun->items).begin(), compute_post, store_post);
      }
    }
    else
    {
      return mEStep->DoEStep((gEtirmRun->examinees).begin(), (gEtirmRun->examinees).end(), compute_post, store_post);
    }
  }

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estep_type* etirm::estep::GetEStep

(

)

[inline]

Returns EStepDiscrete object.

Do not create SWIG wrapper for this member function!

Definition at line 362 of file swig_etirm.h.

References mEStep.

Referenced by etirm::mstep_dist().

    { return mEStep;}

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Member Data Documentation

estep_type* etirm::estep::mEStep [private]

EStepDiscrete object.

Definition at line 368 of file swig_etirm.h.

Referenced by compute(), estep(), GetEStep(), and ~estep().

ItemVector* etirm::estep::mItems [private]

List of items used to initialize mEStep.

Definition at line 369 of file swig_etirm.h.

Referenced by estep(), and ~estep().

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The documentation for this class was generated from the following files:

• C:/programs/etirm/src/swig_etirm.h
• C:/programs/etirm/src/swig_etirm.cpp

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