ETIRM: etirm::ItemRespCounts Class Reference

List of all members.


Public Member Functions
	ItemRespCounts (int ncat, int ngroup)
	Class constructor.
virtual	~ItemRespCounts ()
	Deconstructor.
void	AddResponse (int respIndex, Real count, int group)
	Increments counts based on item response.
Real	RespCount (int group)
	Returns total number of responses to item.
RealVector	CategoryCounts (int group)
	Returns number of responses in each response category.
Protected Attributes
RealVector	totalCount
	Total number of examinees who have responses for the item.
RealMatrix	catCounts
	Number of responses in each response category.

Detailed Description

Constructor & Destructor Documentation

etirm::ItemRespCounts::ItemRespCounts	(	int	ncat,
		int	ngroup
	)			`[inline]`

Class constructor.

Function Parameters

Parameters:

`[in]`	ncat	Number of response categories for the item.
`[in]`	ngroup	Number of examinee groups.

Definition at line 87 of file swig_etirm.h.

00087                                          :
00088       catCounts(ngroup+1, ncat, 0.0), totalCount(ngroup+1, 0.0)
00089     {
00090     }

virtual etirm::ItemRespCounts::~ItemRespCounts ( ) [inline, virtual]

Deconstructor.

Definition at line 93 of file swig_etirm.h.

00094     {
00095     }

Member Function Documentation

void etirm::ItemRespCounts::AddResponse	(	int	respIndex,
		Real	count,
		int	group
	)

Increments counts based on item response.

Function Parameters

Parameters:

`[in]`	respIndex	"One" offset index corresponding to response to increment count for (1 = first response category, 2 = second response category, etc.).
`[in]`	count	Amount to increment counts.
`[in]`	group	Group to increment counts for (1, 2, ...).

Definition at line 121 of file swig_etirm.cpp.

References catCounts, and totalCount.

00122   {
00123 
00124     if (respIndex > catCounts.size() || respIndex < 1)
00125     {
00126       throw InvalidArgument("Invalid response index", "ItemRespCounts::AddResponse");
00127     }
00128 
00129     totalCount[0] += count; // total count
00130     totalCount[group] += count; // count for group
00131 
00132     catCounts(1, respIndex) += count; // total count
00133     catCounts(group+1, respIndex) += count; // count for group
00134   }

Real etirm::ItemRespCounts::RespCount ( int group ) [inline]

Returns total number of responses to item.

Function Parameters

Parameters:

[in] group Group(1, 2, ...) for which counts are to be returned.

Note: group = 0 returns counts across all groups.

Definition at line 111 of file swig_etirm.h.

References totalCount.

00112     {
00113       return totalCount[group];
00114     }

RealVector etirm::ItemRespCounts::CategoryCounts ( int group ) [inline]

Returns number of responses in each response category.

Function Parameters

Parameters:

[in] group Group(1, 2, ...) for which counts are to be returned.

Note: group = 0 returns counts across all groups.

Definition at line 126 of file swig_etirm.h.

References catCounts.

Referenced by etirm::item_cat_counts().

00127     {
00128       return RealVector(catCounts.begin_row(group+1), catCounts.begin_row(group+1)
00129           +catCounts.num_columns());
00130     } // ww: Edit "num_cols" -> "num_columns", 1/8/2008.

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