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For each input vector (which are rows of the matrix samples) the method finds k <= get_max_k() nearest neighbor. In case of regression, the predicted result will be a mean value of the particular vector's neighbor responses. In case of classification the class is determined by voting.

Namespace: Emgu.CV.ML
Assembly: Emgu.CV.ML (in Emgu.CV.ML.dll) Version: 2.4.10.1935 (2.4.10.1935)

Syntax

C#
public static float CvKNearestFindNearest(
	IntPtr classifier,
	IntPtr samples,
	int k,
	IntPtr results,
	IntPtr[] kNearestNeighbors,
	IntPtr neighborResponses,
	IntPtr dist
)
Visual Basic
Public Shared Function CvKNearestFindNearest ( 
	classifier As IntPtr,
	samples As IntPtr,
	k As Integer,
	results As IntPtr,
	kNearestNeighbors As IntPtr(),
	neighborResponses As IntPtr,
	dist As IntPtr
) As Single
Visual C++
public:
static float CvKNearestFindNearest(
	IntPtr classifier, 
	IntPtr samples, 
	int k, 
	IntPtr results, 
	array<IntPtr>^ kNearestNeighbors, 
	IntPtr neighborResponses, 
	IntPtr dist
)
F#
static member CvKNearestFindNearest : 
        classifier : IntPtr * 
        samples : IntPtr * 
        k : int * 
        results : IntPtr * 
        kNearestNeighbors : IntPtr[] * 
        neighborResponses : IntPtr * 
        dist : IntPtr -> float32 

Parameters

classifier
Type: System..::..IntPtr
The KNearest classifier
samples
Type: System..::..IntPtr
The sample matrix where each row is a sample
k
Type: System..::..Int32
The number of nearest neighbor to find
results
Type: System..::..IntPtr
Can be IntPtr.Zero if not needed. If regression, return a mean value of the particular vector's neighbor responses; If classification, return the class determined by voting.
kNearestNeighbors
Type: array<System..::..IntPtr>[]()[][]
Should be IntPtr.Zero if not needed. Setting it to non-null values incures a performance panalty. A matrix of (k * samples.Rows) rows and (samples.Cols) columns that will be filled the data of the K nearest-neighbor for each sample
neighborResponses
Type: System..::..IntPtr
Should be IntPtr.Zero if not needed. The response of the neighbors. A vector of k*_samples->rows elements.
dist
Type: System..::..IntPtr
Should be IntPtr.Zero if not needed. The distances from the input vectors to the neighbors. A vector of k*_samples->rows elements.

Return Value

Type: Single
In case of regression, the predicted result will be a mean value of the particular vector's neighbor responses. In case of classification the class is determined by voting

See Also