SHOGUN
v1.1.0
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The Combined kernel is used to combine a number of kernels into a single CombinedKernel object by linear combination.
It keeps pointers to the added sub-kernels and for each sub-kernel - a kernel specific weight
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It is especially useful to combine kernels working on different domains and to combine kernels looking at independent features and requires CCombinedFeatures to be used.
It is defined as:
Definition at line 46 of file CombinedKernel.h.
Static Public Member Functions | |
static void * | compute_optimized_kernel_helper (void *p) |
static void * | compute_kernel_helper (void *p) |
Protected Member Functions | |
virtual float64_t | compute (int32_t x, int32_t y) |
void | adjust_num_lhs_rhs_initialized (CKernel *k) |
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void | set_property (EKernelProperty p) |
void | unset_property (EKernelProperty p) |
void | set_is_initialized (bool p_init) |
int32_t | compute_row_start (int64_t offs, int32_t n, bool symmetric) |
virtual void | load_serializable_post () throw (ShogunException) |
virtual void | save_serializable_pre () throw (ShogunException) |
virtual void | save_serializable_post () throw (ShogunException) |
virtual void | register_params () |
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virtual void | load_serializable_pre () throw (ShogunException) |
Protected Attributes | |
CList * | kernel_list |
int32_t | sv_count |
int32_t * | sv_idx |
float64_t * | sv_weight |
float64_t * | subkernel_weights_buffer |
bool | append_subkernel_weights |
bool | initialized |
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int32_t | cache_size |
cache_size in MB | |
KERNELCACHE_ELEM * | kernel_matrix |
CFeatures * | lhs |
feature vectors to occur on left hand side | |
CFeatures * | rhs |
feature vectors to occur on right hand side | |
bool | lhs_equals_rhs |
lhs | |
int32_t | num_lhs |
number of feature vectors on left hand side | |
int32_t | num_rhs |
number of feature vectors on right hand side | |
float64_t | combined_kernel_weight |
bool | optimization_initialized |
EOptimizationType | opt_type |
uint64_t | properties |
CKernelNormalizer * | normalizer |
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) |
CCombinedKernel | ( | int32_t | size = 10 , |
bool | append_subkernel_weights = false |
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constructor
size | cache size |
append_subkernel_weights | if subkernel weights shall be appended |
Definition at line 45 of file CombinedKernel.cpp.
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Definition at line 56 of file CombinedKernel.cpp.
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add to normal vector
idx | where to add |
weight | what to add |
Reimplemented from CKernel.
Definition at line 579 of file CombinedKernel.cpp.
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adjust the variables num_lhs, num_rhs and initialized based on the kernel to be appended/inserted
k | kernel |
Definition at line 399 of file CombinedKernel.h.
bool append_kernel | ( | CKernel * | k | ) |
append kernel
k | kernel |
Definition at line 190 of file CombinedKernel.h.
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compute kernel function
x | x |
y | y |
Implements CKernel.
Definition at line 243 of file CombinedKernel.cpp.
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computes output for a batch of examples in an optimized fashion (favorable if kernel supports it, i.e. has KP_BATCHEVALUATION. to the outputvector target (of length num_vec elements) the output for the examples enumerated in vec_idx are added. therefore make sure that it is initialized with ZERO. the following num_suppvec, IDX, alphas arguments are the number of support vectors, their indices and weights
Reimplemented from CKernel.
Definition at line 336 of file CombinedKernel.cpp.
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compute by subkernel
idx | index |
subkernel_contrib | subkernel contribution |
Reimplemented from CKernel.
Definition at line 607 of file CombinedKernel.cpp.
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helper for compute kernel
p | thread parameter |
Definition at line 383 of file CombinedKernel.cpp.
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compute optimized
idx | index to compute |
Reimplemented from CKernel.
Definition at line 534 of file CombinedKernel.cpp.
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helper for compute optimized kernel
p | thread parameter |
Definition at line 370 of file CombinedKernel.cpp.
bool delete_kernel | ( | ) |
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delete optimization
Reimplemented from CKernel.
Definition at line 310 of file CombinedKernel.cpp.
void emulate_compute_batch | ( | CKernel * | k, |
int32_t | num_vec, | ||
int32_t * | vec_idx, | ||
float64_t * | target, | ||
int32_t | num_suppvec, | ||
int32_t * | IDX, | ||
float64_t * | weights | ||
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emulates batch computation, via linadd optimization w^t x or even down to sum_i alpha_i K(x_i,x)
k | kernel |
num_vec | number of vectors |
vec_idx | vector index |
target | target |
num_suppvec | number of support vectors |
IDX | IDX |
weights | weights |
Definition at line 405 of file CombinedKernel.cpp.
bool get_append_subkernel_weights | ( | ) |
check if subkernel weights are appended
Definition at line 224 of file CombinedKernel.h.
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return feature class the kernel can deal with
Implements CKernel.
Definition at line 92 of file CombinedKernel.h.
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return feature type the kernel can deal with
Implements CKernel.
Definition at line 83 of file CombinedKernel.h.
CKernel* get_first_kernel | ( | ) |
CKernel* get_first_kernel | ( | CListElement *& | current | ) |
get first kernel
current |
Definition at line 120 of file CombinedKernel.h.
CKernel* get_kernel | ( | int32_t | idx | ) |
get kernel
idx | index of kernel |
Definition at line 130 of file CombinedKernel.h.
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return what type of kernel we are
Implements CKernel.
Definition at line 74 of file CombinedKernel.h.
CKernel* get_last_kernel | ( | ) |
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return the kernel's name
Implements CSGObject.
Definition at line 101 of file CombinedKernel.h.
CKernel* get_next_kernel | ( | ) |
CKernel* get_next_kernel | ( | CListElement *& | current | ) |
get next kernel multi-thread safe
current |
Definition at line 164 of file CombinedKernel.h.
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get number of subkernels
Reimplemented from CKernel.
Definition at line 233 of file CombinedKernel.h.
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get subkernel weights
num_weights | where number of weights is stored |
Reimplemented from CKernel.
Definition at line 646 of file CombinedKernel.cpp.
get subkernel weights (swig compatible)
Definition at line 688 of file CombinedKernel.cpp.
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test whether features have been assigned to lhs and rhs
Reimplemented from CKernel.
Definition at line 257 of file CombinedKernel.h.
initialize kernel
lhs | features of left-hand side |
rhs | features of right-hand side |
Reimplemented from CKernel.
Definition at line 67 of file CombinedKernel.cpp.
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initialize optimization
count | count |
IDX | index |
weights | weights |
Reimplemented from CKernel.
Definition at line 259 of file CombinedKernel.cpp.
bool insert_kernel | ( | CKernel * | k | ) |
insert kernel
k | kernel |
Definition at line 174 of file CombinedKernel.h.
CCombinedKernel* KernelToCombinedKernel | ( | shogun::CKernel * | n | ) |
casts kernel to combined kernel
n | kernel to cast |
Definition at line 380 of file CombinedKernel.h.
void list_kernels | ( | ) |
list kernels
Definition at line 225 of file CombinedKernel.cpp.
bool precompute_subkernels | ( | ) |
precompute all sub-kernels
Definition at line 746 of file CombinedKernel.cpp.
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remove lhs from kernel
Reimplemented from CKernel.
Definition at line 147 of file CombinedKernel.cpp.
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remove lhs and rhs from kernel
Reimplemented from CKernel.
Definition at line 184 of file CombinedKernel.cpp.
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remove rhs from kernel
Reimplemented from CKernel.
Definition at line 167 of file CombinedKernel.cpp.
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set optimization type
t | optimization type |
Reimplemented from CKernel.
Definition at line 731 of file CombinedKernel.cpp.
set subkernel weights
weights | new subkernel weights |
Reimplemented from CKernel.
Definition at line 696 of file CombinedKernel.cpp.
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if subkernel weights are appended
Definition at line 449 of file CombinedKernel.h.
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whether kernel is ready to be used
Definition at line 451 of file CombinedKernel.h.
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list of kernels
Definition at line 439 of file CombinedKernel.h.
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subkernel weights buffers
Definition at line 447 of file CombinedKernel.h.
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support vector count
Definition at line 441 of file CombinedKernel.h.
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support vector index
Definition at line 443 of file CombinedKernel.h.
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support vector weights
Definition at line 445 of file CombinedKernel.h.