SHOGUN
v1.1.0
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An experimental kernel inspired by the WeightedDegreePositionStringKernel and the Gaussian kernel.
It is computed as
where is the kernel width. The idea is to shift the dimensions of the input vectors against eachother.
is the step size (parameter shift_step) of the shifts and
(parameter max_shift) is the maximal shift.
Definition at line 37 of file GaussianShiftKernel.h.
Public Member Functions | |
CGaussianShiftKernel () | |
CGaussianShiftKernel (int32_t size, float64_t width, int32_t max_shift, int32_t shift_step) | |
CGaussianShiftKernel (CSimpleFeatures< float64_t > *l, CSimpleFeatures< float64_t > *r, float64_t width, int32_t max_shift, int32_t shift_step, int32_t size=10) | |
virtual | ~CGaussianShiftKernel () |
virtual EKernelType | get_kernel_type () |
virtual const char * | get_name () const |
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CGaussianKernel () | |
CGaussianKernel (int32_t size, float64_t width) | |
CGaussianKernel (CDotFeatures *l, CDotFeatures *r, float64_t width, int32_t size=10) | |
virtual | ~CGaussianKernel () |
virtual bool | init (CFeatures *l, CFeatures *r) |
virtual void | cleanup () |
virtual void | set_width (float64_t w) |
virtual float64_t | get_width () const |
void | set_compact_enabled (bool compact) |
bool | get_compact_enabled () |
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CDotKernel () | |
CDotKernel (int32_t cachesize) | |
CDotKernel (CFeatures *l, CFeatures *r) | |
virtual EFeatureClass | get_feature_class () |
virtual EFeatureType | get_feature_type () |
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CKernel () | |
CKernel (int32_t size) | |
CKernel (CFeatures *l, CFeatures *r, int32_t size) | |
virtual | ~CKernel () |
float64_t | kernel (int32_t idx_a, int32_t idx_b) |
SGMatrix< float64_t > | get_kernel_matrix () |
virtual SGVector< float64_t > | get_kernel_col (int32_t j) |
virtual SGVector< float64_t > | get_kernel_row (int32_t i) |
template<class T > | |
SGMatrix< T > | get_kernel_matrix () |
virtual bool | set_normalizer (CKernelNormalizer *normalizer) |
virtual CKernelNormalizer * | get_normalizer () |
virtual bool | init_normalizer () |
void | load (CFile *loader) |
void | save (CFile *writer) |
CFeatures * | get_lhs () |
CFeatures * | get_rhs () |
virtual int32_t | get_num_vec_lhs () |
virtual int32_t | get_num_vec_rhs () |
virtual bool | has_features () |
bool | get_lhs_equals_rhs () |
virtual void | remove_lhs_and_rhs () |
virtual void | remove_lhs () |
virtual void | remove_rhs () |
takes all necessary steps if the rhs is removed from kernel | |
void | set_cache_size (int32_t size) |
int32_t | get_cache_size () |
void | list_kernel () |
bool | has_property (EKernelProperty p) |
virtual void | clear_normal () |
virtual void | add_to_normal (int32_t vector_idx, float64_t weight) |
EOptimizationType | get_optimization_type () |
virtual void | set_optimization_type (EOptimizationType t) |
bool | get_is_initialized () |
virtual bool | init_optimization (int32_t count, int32_t *IDX, float64_t *weights) |
virtual bool | delete_optimization () |
bool | init_optimization_svm (CSVM *svm) |
virtual float64_t | compute_optimized (int32_t vector_idx) |
virtual void | compute_batch (int32_t num_vec, int32_t *vec_idx, float64_t *target, int32_t num_suppvec, int32_t *IDX, float64_t *alphas, float64_t factor=1.0) |
float64_t | get_combined_kernel_weight () |
void | set_combined_kernel_weight (float64_t nw) |
virtual int32_t | get_num_subkernels () |
virtual void | compute_by_subkernel (int32_t vector_idx, float64_t *subkernel_contrib) |
virtual const float64_t * | get_subkernel_weights (int32_t &num_weights) |
virtual void | set_subkernel_weights (SGVector< float64_t > weights) |
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CSGObject () | |
CSGObject (const CSGObject &orig) | |
virtual | ~CSGObject () |
virtual bool | is_generic (EPrimitiveType *generic) const |
template<class T > | |
void | set_generic () |
void | unset_generic () |
virtual void | print_serializable (const char *prefix="") |
virtual bool | save_serializable (CSerializableFile *file, const char *prefix="") |
virtual bool | load_serializable (CSerializableFile *file, const char *prefix="") |
void | set_global_io (SGIO *io) |
SGIO * | get_global_io () |
void | set_global_parallel (Parallel *parallel) |
Parallel * | get_global_parallel () |
void | set_global_version (Version *version) |
Version * | get_global_version () |
SGVector< char * > | get_modelsel_names () |
char * | get_modsel_param_descr (const char *param_name) |
index_t | get_modsel_param_index (const char *param_name) |
Protected Member Functions | |
virtual float64_t | compute (int32_t idx_a, int32_t idx_b) |
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virtual void | load_serializable_post () throw (ShogunException) |
Protected Attributes | |
int32_t | max_shift |
int32_t | shift_step |
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float64_t | width |
float64_t * | sq_lhs |
float64_t * | sq_rhs |
bool | m_compact |
Additional Inherited Members | |
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SGIO * | io |
Parallel * | parallel |
Version * | version |
Parameter * | m_parameters |
Parameter * | m_model_selection_parameters |
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template<class T > | |
static void * | get_kernel_matrix_helper (void *p) |
default constructor
Definition at line 19 of file GaussianShiftKernel.cpp.
CGaussianShiftKernel | ( | int32_t | size, |
float64_t | width, | ||
int32_t | max_shift, | ||
int32_t | shift_step | ||
) |
constructor
size | cache size |
width | width |
max_shift | maximum shift |
shift_step | shift step |
Definition at line 25 of file GaussianShiftKernel.cpp.
CGaussianShiftKernel | ( | CSimpleFeatures< float64_t > * | l, |
CSimpleFeatures< float64_t > * | r, | ||
float64_t | width, | ||
int32_t | max_shift, | ||
int32_t | shift_step, | ||
int32_t | size = 10 |
||
) |
constructor
l | features of left-hand side |
r | features of right-hand side |
width | width |
max_shift | maximum shift |
shift_step | shift step |
size | cache size |
Definition at line 32 of file GaussianShiftKernel.cpp.
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virtual |
Definition at line 41 of file GaussianShiftKernel.cpp.
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protectedvirtual |
compute kernel function for features a and b idx_{a,b} denote the index of the feature vectors in the corresponding feature object
idx_a | index a |
idx_b | index b |
Reimplemented from CGaussianKernel.
Definition at line 45 of file GaussianShiftKernel.cpp.
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virtual |
return what type of kernel we are
Reimplemented from CGaussianKernel.
Definition at line 74 of file GaussianShiftKernel.h.
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virtual |
return the kernel's name
Reimplemented from CGaussianKernel.
Definition at line 80 of file GaussianShiftKernel.h.
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protected |
maximum shift
Definition at line 98 of file GaussianShiftKernel.h.
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protected |
shift step
Definition at line 100 of file GaussianShiftKernel.h.