The Custom Kernel allows for custom user provided kernel matrices.
For squared training matrices it allows to store only the upper triangle of the kernel to save memory: Full symmetric kernel matrices can be stored as is or can be internally converted into (or directly given in) upper triangle representation. Also note that values are stored as 32bit floats.
Definition at line 29 of file CustomKernel.h.
Public Member Functions | |
| CCustomKernel () | |
| CCustomKernel (CKernel *k) | |
| CCustomKernel (const float64_t *km, int32_t rows, int32_t cols) | |
| CCustomKernel (const float32_t *km, int32_t rows, int32_t cols) | |
| virtual | ~CCustomKernel () |
| virtual bool | dummy_init (int32_t rows, int32_t cols) |
| virtual bool | init (CFeatures *l, CFeatures *r) |
| virtual void | cleanup () |
| virtual EKernelType | get_kernel_type () |
| virtual EFeatureType | get_feature_type () |
| virtual EFeatureClass | get_feature_class () |
| virtual const char * | get_name () const |
| bool | set_triangle_kernel_matrix_from_triangle (const float64_t *km, int32_t len) |
| bool | set_triangle_kernel_matrix_from_triangle (const float32_t *km, int32_t len) |
| template<class T > | |
| bool | set_triangle_kernel_matrix_from_triangle_generic (const T *km, int64_t len) |
| bool | set_triangle_kernel_matrix_from_full (const float64_t *km, int32_t rows, int32_t cols) |
| bool | set_triangle_kernel_matrix_from_full (const float32_t *km, int32_t rows, int32_t cols) |
| template<class T > | |
| bool | set_triangle_kernel_matrix_from_full_generic (const T *km, int32_t rows, int32_t cols) |
| bool | set_full_kernel_matrix_from_full (const float64_t *km, int32_t rows, int32_t cols) |
| bool | set_full_kernel_matrix_from_full (const float32_t *km, int32_t rows, int32_t cols) |
| template<class T > | |
| bool | set_full_kernel_matrix_from_full_generic (const T *km, int32_t rows, int32_t cols) |
| virtual int32_t | get_num_vec_lhs () |
| virtual int32_t | get_num_vec_rhs () |
| virtual bool | has_features () |
Protected Member Functions | |
| virtual float64_t | compute (int32_t row, int32_t col) |
Protected Attributes | |
| float32_t * | kmatrix |
| int32_t | num_rows |
| int32_t | num_cols |
| bool | upper_diagonal |
| CCustomKernel | ( | ) |
default constructor
Definition at line 27 of file CustomKernel.cpp.
| CCustomKernel | ( | CKernel * | k | ) |
constructor
compute custom kernel from given kernel matrix
| k | kernel matrix |
Definition at line 33 of file CustomKernel.cpp.
| CCustomKernel | ( | const float64_t * | km, | |
| int32_t | rows, | |||
| int32_t | cols | |||
| ) |
constructor
sets full kernel matrix from full kernel matrix (from double precision floats)
| km | kernel matrix | |
| rows | number of rows in matrix | |
| cols | number of cols in matrix |
Definition at line 76 of file CustomKernel.cpp.
| CCustomKernel | ( | const float32_t * | km, | |
| int32_t | rows, | |||
| int32_t | cols | |||
| ) |
constructor
sets full kernel matrix from full kernel matrix (from single precision floats)
| km | kernel matrix | |
| rows | number of rows in matrix | |
| cols | number of cols in matrix |
Definition at line 84 of file CustomKernel.cpp.
| ~CCustomKernel | ( | ) | [virtual] |
Definition at line 92 of file CustomKernel.cpp.
| void cleanup | ( | ) | [virtual] |
| virtual float64_t compute | ( | int32_t | row, | |
| int32_t | col | |||
| ) | [protected, virtual] |
compute kernel function
| row | row | |
| col | col |
Implements CKernel.
Definition at line 360 of file CustomKernel.h.
| bool dummy_init | ( | int32_t | rows, | |
| int32_t | cols | |||
| ) | [virtual] |
initialize kernel with dummy features
Kernels always need feature objects assigned. As the custom kernel does not really require this it creates some magic dummy features that only know about the number of vectors
| rows | features of left-hand side | |
| cols | features of right-hand side |
Definition at line 97 of file CustomKernel.cpp.
| virtual EFeatureClass get_feature_class | ( | ) | [virtual] |
return feature class the kernel can deal with
Implements CKernel.
Definition at line 111 of file CustomKernel.h.
| virtual EFeatureType get_feature_type | ( | ) | [virtual] |
return feature type the kernel can deal with
Implements CKernel.
Definition at line 105 of file CustomKernel.h.
| virtual EKernelType get_kernel_type | ( | ) | [virtual] |
return what type of kernel we are
Implements CKernel.
Definition at line 99 of file CustomKernel.h.
| virtual const char* get_name | ( | void | ) | const [virtual] |
return the kernel's name
Implements CSGObject.
Definition at line 117 of file CustomKernel.h.
| virtual int32_t get_num_vec_lhs | ( | ) | [virtual] |
get number of vectors of lhs features
Reimplemented from CKernel.
Definition at line 330 of file CustomKernel.h.
| virtual int32_t get_num_vec_rhs | ( | ) | [virtual] |
get number of vectors of rhs features
Reimplemented from CKernel.
Definition at line 339 of file CustomKernel.h.
| virtual bool has_features | ( | ) | [virtual] |
test whether features have been assigned to lhs and rhs
Reimplemented from CKernel.
Definition at line 348 of file CustomKernel.h.
initialize kernel
| l | features of left-hand side | |
| r | features of right-hand side |
Reimplemented from CKernel.
Definition at line 102 of file CustomKernel.cpp.
| bool set_full_kernel_matrix_from_full | ( | const float32_t * | km, | |
| int32_t | rows, | |||
| int32_t | cols | |||
| ) |
set full kernel matrix from full kernel matrix
for float32's
| km | kernel matrix | |
| rows | number of rows in matrix | |
| cols | number of cols in matrix |
Definition at line 288 of file CustomKernel.h.
| bool set_full_kernel_matrix_from_full | ( | const float64_t * | km, | |
| int32_t | rows, | |||
| int32_t | cols | |||
| ) |
set full kernel matrix from full kernel matrix
for float64's
| km | kernel matrix | |
| rows | number of rows in matrix | |
| cols | number of cols in matrix |
Definition at line 273 of file CustomKernel.h.
| bool set_full_kernel_matrix_from_full_generic | ( | const T * | km, | |
| int32_t | rows, | |||
| int32_t | cols | |||
| ) |
set full kernel matrix from full kernel matrix
| km | kernel matrix | |
| rows | number of rows in matrix | |
| cols | number of cols in matrix |
Definition at line 302 of file CustomKernel.h.
| bool set_triangle_kernel_matrix_from_full | ( | const float64_t * | km, | |
| int32_t | rows, | |||
| int32_t | cols | |||
| ) |
set kernel matrix (only elements from upper triangle) from squared matrix
for float64's
| km | kernel matrix | |
| rows | number of rows in matrix | |
| cols | number of cols in matrix |
Definition at line 207 of file CustomKernel.h.
| bool set_triangle_kernel_matrix_from_full | ( | const float32_t * | km, | |
| int32_t | rows, | |||
| int32_t | cols | |||
| ) |
set kernel matrix (only elements from upper triangle) from squared matrix
for float32's
| km | kernel matrix | |
| rows | number of rows in matrix | |
| cols | number of cols in matrix |
Definition at line 223 of file CustomKernel.h.
| bool set_triangle_kernel_matrix_from_full_generic | ( | const T * | km, | |
| int32_t | rows, | |||
| int32_t | cols | |||
| ) |
set kernel matrix (only elements from upper triangle) from squared matrix
| km | kernel matrix | |
| rows | number of rows in matrix | |
| cols | number of cols in matrix |
Definition at line 238 of file CustomKernel.h.
| bool set_triangle_kernel_matrix_from_triangle | ( | const float32_t * | km, | |
| int32_t | len | |||
| ) |
set kernel matrix (only elements from upper triangle) from elements of upper triangle (concat'd), including the main diagonal
small variant for floats32's, triangle needs to have less than 2**32 elements
| km | kernel matrix | |
| len | denotes the size of the array and should match len=cols*(cols+1)/2 |
Definition at line 145 of file CustomKernel.h.
| bool set_triangle_kernel_matrix_from_triangle | ( | const float64_t * | km, | |
| int32_t | len | |||
| ) |
set kernel matrix (only elements from upper triangle) from elements of upper triangle (concat'd), including the main diagonal
small variant for floats64's, triangle needs to have less than 2**32 elements
| km | kernel matrix | |
| len | denotes the size of the array and should match len=cols*(cols+1)/2 |
Definition at line 129 of file CustomKernel.h.
| bool set_triangle_kernel_matrix_from_triangle_generic | ( | const T * | km, | |
| int64_t | len | |||
| ) |
set kernel matrix (only elements from upper triangle) from elements of upper triangle (concat'd), including the main diagonal
big variant, allowing the triangle to have more than 2**31-1 elements
| km | kernel matrix | |
| len | denotes the size of the array and should match len=cols*(cols+1)/2 |
Definition at line 162 of file CustomKernel.h.
kernel matrix
Definition at line 390 of file CustomKernel.h.
int32_t num_cols [protected] |
number of columns
Definition at line 394 of file CustomKernel.h.
int32_t num_rows [protected] |
number of rows
Definition at line 392 of file CustomKernel.h.
bool upper_diagonal [protected] |
upper diagonal
Definition at line 396 of file CustomKernel.h.
