CLogPlusOne Class Reference
Detailed Description
Preprocessor LogPlusOne does what the name says, it adds one to a dense real valued vector and takes the logarithm of each component of it.
![\[ {\bf x}\leftarrow \log({\bf x}+{\bf 1} \]](form_85.png)
It therefore does not need any initialization. It is most useful in situations where the inputs are counts: When one compares differences of small counts any difference may matter a lot, while small differences in large counts don't. This is what this log transformation controls for.
Definition at line 30 of file LogPlusOne.h.
Public Member Functions | |
| CLogPlusOne () | |
| virtual | ~CLogPlusOne () |
| virtual bool | init (CFeatures *f) |
| initialize preprocessor from features | |
| virtual bool | load_init_data (FILE *src) |
| initialize preprocessor from file | |
| virtual bool | save_init_data (FILE *dst) |
| save init-data (like transforamtion matrices etc) to file | |
| virtual void | cleanup () |
| cleanup | |
| virtual bool | load (FILE *f) |
| initialize preprocessor from file | |
| virtual bool | save (FILE *f) |
| save preprocessor init-data to file | |
| virtual float64_t * | apply_to_feature_matrix (CFeatures *f) |
| virtual float64_t * | apply_to_feature_vector (float64_t *f, int32_t &len) |
Constructor & Destructor Documentation
| CLogPlusOne::CLogPlusOne | ( | ) |
default constructor
Definition at line 17 of file LogPlusOne.cpp.
| CLogPlusOne::~CLogPlusOne | ( | ) | [virtual] |
Definition at line 23 of file LogPlusOne.cpp.
Member Function Documentation
| bool CLogPlusOne::init | ( | CFeatures * | f | ) | [virtual] |
initialize preprocessor from features
Implements CPreProc.
Definition at line 28 of file LogPlusOne.cpp.
| bool CLogPlusOne::load_init_data | ( | FILE * | src | ) | [virtual] |
initialize preprocessor from file
Implements CPreProc.
Definition at line 87 of file LogPlusOne.cpp.
| bool CLogPlusOne::save_init_data | ( | FILE * | dst | ) | [virtual] |
save init-data (like transforamtion matrices etc) to file
Implements CPreProc.
Definition at line 93 of file LogPlusOne.cpp.
| void CLogPlusOne::cleanup | ( | ) | [virtual] |
cleanup
clean up allocated memory
Implements CPreProc.
Definition at line 37 of file LogPlusOne.cpp.
| bool CLogPlusOne::load | ( | FILE * | f | ) | [virtual] |
| bool CLogPlusOne::save | ( | FILE * | f | ) | [virtual] |
apply preproc on feature matrix result in feature matrix return pointer to feature_matrix, i.e. f->get_feature_matrix();
apply preproc on feature matrix result in feature matrix return pointer to feature_matrix, i.e. f->get_feature_matrix();
Implements CSimplePreProc< ST >.
Definition at line 56 of file LogPlusOne.cpp.
apply preproc on single feature vector result in feature matrix
apply preproc on single feature vector result in feature matrix
Definition at line 75 of file LogPlusOne.cpp.
The documentation for this class was generated from the following files: