class CosineDistance
The Cosine distance is obtained by using the Cosine similarity (Orchini similarity, angular similarity, normalized dot product), which measures similarity between two vectors by finding their angle. An extension to the Cosine similarity yields the Tanimoto coefficient.
Definition at line 36 of file CosineDistance.h.
Public Member Functions | |
CCosineDistance () | |
CCosineDistance (CSimpleFeatures< float64_t > *l, CSimpleFeatures< float64_t > *r) | |
virtual | ~CCosineDistance () |
virtual bool | init (CFeatures *l, CFeatures *r) |
virtual void | cleanup () |
virtual EDistanceType | get_distance_type () |
virtual const char * | get_name () const |
Protected Member Functions | |
virtual float64_t | compute (int32_t idx_a, int32_t idx_b) |
CCosineDistance | ( | ) |
default constructor
Definition at line 20 of file CosineDistance.cpp.
CCosineDistance | ( | CSimpleFeatures< float64_t > * | l, | |
CSimpleFeatures< float64_t > * | r | |||
) |
constructor
l | features of left-hand side | |
r | features of right-hand side |
Definition at line 25 of file CosineDistance.cpp.
~CCosineDistance | ( | ) | [virtual] |
Definition at line 31 of file CosineDistance.cpp.
void cleanup | ( | ) | [virtual] |
cleanup distance
Implements CSimpleDistance< float64_t >.
Definition at line 41 of file CosineDistance.cpp.
float64_t compute | ( | int32_t | idx_a, | |
int32_t | idx_b | |||
) | [protected, virtual] |
compute distance for features a and b idx_{a,b} denote the index of the feature vectors in the corresponding feature object
Implements CDistance.
Definition at line 45 of file CosineDistance.cpp.
virtual EDistanceType get_distance_type | ( | ) | [virtual] |
get distance type we are
Implements CSimpleDistance< float64_t >.
Definition at line 65 of file CosineDistance.h.
virtual const char* get_name | ( | void | ) | const [virtual] |
get name of the distance
Reimplemented from CSimpleDistance< float64_t >.
Definition at line 71 of file CosineDistance.h.
init distance
l | features of left-hand side | |
r | features of right-hand side |
Reimplemented from CSimpleDistance< float64_t >.
Definition at line 36 of file CosineDistance.cpp.