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PLearn 0.1
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Apply an affine transformation to the field: y = a*x+b. More...
#include <SDBVMat.h>


Public Member Functions | |
| SDBVMFieldAffine (SDBVMSource source, real a, real b=0.0, real missing_values_mapping=MISSING_VALUE) | |
| virtual void | convertField (const SDBWithStats &sdb, const Row &row, const Vec &output) const |
| virtual int | fieldWidth () const |
| Width that the field occupies in the VMat. | |
Protected Attributes | |
| real | a_ |
| real | b_ |
Private Types | |
| typedef SDBVMFieldSource1 | inherited |
typedef SDBVMFieldSource1 PLearn::SDBVMFieldAffine::inherited [private] |
Reimplemented from PLearn::SDBVMFieldSource1.
| PLearn::SDBVMFieldAffine::SDBVMFieldAffine | ( | SDBVMSource | source, |
| real | a, | ||
| real | b = 0.0, |
||
| real | missing_values_mapping = MISSING_VALUE |
||
| ) | [inline] |
| void PLearn::SDBVMFieldAffine::convertField | ( | const SDBWithStats & | sdb, |
| const Row & | theRow, | ||
| const Vec & | outputField | ||
| ) | const [virtual] |
Given a database row, convert the appropriate parts to a (preallocated) output vector of the correct width (given by fieldWidth). Replace MISSING_VALUEs by missing_values_mapping.
Implements PLearn::SDBVMField.
Definition at line 349 of file SDBVMat.cc.
References a_, b_, PLearn::SDBVMField::convertMissing(), PLearn::SDBVMSource::getValue(), and PLearn::SDBVMFieldSource1::source_.
{
real v = source_.getValue(sdb,row);
//if (is_missing(v))
// output[0] = MISSING_VALUE;
//else
output[0] = a_ * v + b_;
convertMissing(output);
}

| int PLearn::SDBVMFieldAffine::fieldWidth | ( | ) | const [virtual] |
Width that the field occupies in the VMat.
Implements PLearn::SDBVMField.
Definition at line 360 of file SDBVMat.cc.
{
return 1;
}
real PLearn::SDBVMFieldAffine::a_ [protected] |
Definition at line 398 of file SDBVMat.h.
Referenced by convertField().
real PLearn::SDBVMFieldAffine::b_ [protected] |
Definition at line 398 of file SDBVMat.h.
Referenced by convertField().
1.7.4