#include <example-selector.h>
Inheritance diagram for ExampleSelector:
ExampleSelector does not specify any particular method of picking a training and test set, nor does it care about the data itself. The only input is a vector of labels, where each element in the vector corresponds to one image (or other data point).
To use ExampleSelector, simply subclass it and implement SelectExamples(). Within this function, designate training and testing examples by using AddTrainingExample() and AddTestingExample(). There are a number of protected member functions at your disposal that could help make things easier.
Public Member Functions | |
| ExampleSelector (const vector< int > &labels) | |
| virtual | ~ExampleSelector () |
| vector< LabeledIndex > | GetTrainingExamples () |
| Returns a vector of LabeledIndices of training instances sorted by index. | |
| vector< LabeledIndex > | GetTestingExamples () |
| Returns a vector of LabeledIndices of testing instances sorted by index. | |
| vector< int > | GetUniqueLabels () |
| Returns a vector containing all the unique labels seen. Sorting is NOT guaranteed. | |
| int | GetNumExamples () const |
| Returns the total number of examples there are. | |
Protected Member Functions | |
| const vector< LabeledIndex > & | GetExamples () const |
| Get all of the examples (in the same order as given when constructed). | |
| vector< LabeledIndex > | InvertSelection (const vector< LabeledIndex > &selection) const |
| Returns all instances are NOT in <selection>. | |
| vector< LabeledIndex > | InvertSelection (const vector< LabeledIndex > &selection, const vector< LabeledIndex > &superset) const |
| Returns all instances in <superset> that are NOT in <selection>. | |
| vector< LabeledIndex > | RandomSample (int n, const vector< LabeledIndex > &selection) const |
| Return a random sample of size <n> of <selection>. | |
| vector< LabeledIndex > | GetInstancesWithLabel (int label, const vector< LabeledIndex > &selection) const |
| Gets all elements in <selection> with the given <label>. | |
| void | AddTrainingExample (LabeledIndex index) |
| Add a LabeledIndex to the list of designated training examples. | |
| void | AddTestingExample (LabeledIndex index) |
| Add a LabeledIndex to the list of designated testing examples. | |
| virtual void | SelectExamples ()=0 |
| Responsible for calling AddTrainingExample and AddTestingExample to generate the lists. | |
| ExampleSelector | ( | const vector< int > & | labels | ) |
| virtual ~ExampleSelector | ( | ) | [inline, virtual] |
| vector< LabeledIndex > GetTrainingExamples | ( | ) |
Returns a vector of LabeledIndices of training instances sorted by index.
| vector< LabeledIndex > GetTestingExamples | ( | ) |
Returns a vector of LabeledIndices of testing instances sorted by index.
| vector< int > GetUniqueLabels | ( | ) |
Returns a vector containing all the unique labels seen. Sorting is NOT guaranteed.
| int GetNumExamples | ( | ) | const |
Returns the total number of examples there are.
| const vector< LabeledIndex > & GetExamples | ( | ) | const [protected] |
Get all of the examples (in the same order as given when constructed).
| vector< LabeledIndex > InvertSelection | ( | const vector< LabeledIndex > & | selection | ) | const [protected] |
Returns all instances are NOT in <selection>.
<selection> must be sorted by index. The output will be sorted by index.
| vector< LabeledIndex > InvertSelection | ( | const vector< LabeledIndex > & | selection, | |
| const vector< LabeledIndex > & | superset | |||
| ) | const [protected] |
Returns all instances in <superset> that are NOT in <selection>.
<selection> and <superset> must be sorted by index. The output will be sorted by index.
| vector< LabeledIndex > RandomSample | ( | int | n, | |
| const vector< LabeledIndex > & | selection | |||
| ) | const [protected] |
Return a random sample of size <n> of <selection>.
<selection> must be sorted by index. If the size of <selection> is less than n, this function will return a vector of size selection.size(). Output is sorted by index.
| vector< LabeledIndex > GetInstancesWithLabel | ( | int | label, | |
| const vector< LabeledIndex > & | selection | |||
| ) | const [protected] |
Gets all elements in <selection> with the given <label>.
<selection> must be sorted. The output will be sorted.
| void AddTrainingExample | ( | LabeledIndex | index | ) | [protected] |
Add a LabeledIndex to the list of designated training examples.
| void AddTestingExample | ( | LabeledIndex | index | ) | [protected] |
Add a LabeledIndex to the list of designated testing examples.
| virtual void SelectExamples | ( | ) | [protected, pure virtual] |
Responsible for calling AddTrainingExample and AddTestingExample to generate the lists.
Implemented in ETHSelector, and RandomSelector.
1.5.1