This is sort-of the opposite of discretize. It converts each nominal attribute to a categorical distribution by representing each value using the corresponding row of the identity matrix. For example, if a certain nominal attribute has 4 possible values, then a value of 3 would be encoded as the vector 0 0 1 0. When predictions are converted back to nominal values, the mode of the categorical distribution is used as the predicted value. (This is similar to Weka's NominalToBinaryFilter.)
|
| GNominalToCat (size_t valueCap=12, double lo=0.0, double hi=1.0) |
|
| GNominalToCat (const GDomNode *pNode) |
| Load from a DOM. More...
|
|
virtual | ~GNominalToCat () |
|
void | preserveUnknowns () |
| Specify to preserve unknown values. That is, an unknown nominal value will be converted to a distribution of all unknown real values. More...
|
|
void | reverseAttrMap (std::vector< size_t > &rmap) |
| Makes a mapping from the post-transform attribute indexes to the pre-transform attribute indexes. More...
|
|
virtual GDomNode * | serialize (GDom *pDoc) const |
| Marshal this object into a DOM, which can then be converted to a variety of serial formats. More...
|
|
virtual void | transform (const GVec &in, GVec &out) |
| See the comment for GIncrementalTransform::transform. More...
|
|
virtual void | untransform (const GVec &in, GVec &out) |
| See the comment for GIncrementalTransform::untransform. More...
|
|
virtual void | untransformToDistribution (const GVec &in, GPrediction *pOut) |
| See the comment for GIncrementalTransform::untransformToDistribution. More...
|
|
| GIncrementalTransform () |
|
| GIncrementalTransform (const GDomNode *pNode) |
|
virtual | ~GIncrementalTransform () |
|
const GRelation & | after () const |
| Returns a relation object describing the data after it is transformed. More...
|
|
const GRelation & | before () const |
| Returns a relation object describing the data before it is transformed. More...
|
|
GVec & | innerBuf () |
| Returns a buffer of sufficient size to store an inner (transformed) vector. The caller should not to delete the buffer. The same buffer will be returned each time. More...
|
|
virtual GMatrix * | reduce (const GMatrix &in) |
| This calls train, then calls transformBatch, and returns the result. More...
|
|
void | setAfter (GRelation *pRel) |
| Sets the after relation. Takes ownership of pRel. More...
|
|
void | setBefore (GRelation *pRel) |
| Sets the before relation. Takes ownership of pRel. More...
|
|
void | train (const GMatrix &data) |
| Trains the transform on the data in pData. (This method may be a no-op for transformations that always behave in the same manner.) More...
|
|
void | train (const GRelation &pRelation) |
| "Trains" the transform without any data. More...
|
|
virtual GMatrix * | transformBatch (const GMatrix &in) |
| This assumes that train has already been called, and transforms all the rows in in returning the resulting matrix. The caller is responsible for deleting the new matrix. More...
|
|
virtual std::unique_ptr< GMatrix > | untransformBatch (const GMatrix &in) |
| This assumes train was previously called, and untransforms all the rows in pIn and returns the results. More...
|
|
| GTransform () |
|
| GTransform (const GDomNode *pNode) |
|
virtual | ~GTransform () |
|