Calculates the difference in relative absolute sums of two vectors (centering and weights ignored). More...
#include <measure.h>
Public Member Functions | |
| double | Measure (const float *adX, size_t iN, const float *adY, size_t iM, EMap eMap=EMapNone, const float *adWX=NULL, const float *adWY=NULL) const |
| Calculate the measure between two given vectors with optional element weights. | |
| const char * | GetName () const |
| Return the human-readable unique identifier of the measure type. | |
| bool | IsRank () const |
| Return true if the measure requires rank-based integer inputs. | |
| IMeasure * | Clone () const |
| Create a copy of the current measure object. | |
Detailed Description
Calculates the difference in relative absolute sums of two vectors (centering and weights ignored).
For two vectors [X0, ..., XN] and [Y0, ..., YN], calculates:
1 - sum(|Xi - Yi|)/sum(|Xi| + |Yi|)
This is useful for detecting whether two vectors vary in approximately the same way (as per Pearson correlation) and at approximately the same values (as per Euclidean distance).
Member Function Documentation
| IMeasure* Sleipnir::CMeasureRelativeAUC::Clone | ( | ) | const [inline, virtual] |
Create a copy of the current measure object.
- Returns:
- Copy of the current measure object.
- Remarks:
- Caller is, of course, responsible for destroying the created object.
Implements Sleipnir::IMeasure.
| const char* Sleipnir::CMeasureRelativeAUC::GetName | ( | ) | const [inline, virtual] |
Return the human-readable unique identifier of the measure type.
- Returns:
- The string identifier of the measure type.
Implements Sleipnir::IMeasure.
| bool Sleipnir::CMeasureRelativeAUC::IsRank | ( | ) | const [inline, virtual] |
Return true if the measure requires rank-based integer inputs.
- Returns:
- True if the measure requires rank-based input vectors.
- Remarks:
- The input vectors for rank measures should contain only floating point values with no fractional part; behavior is undefined if they don't.
Implements Sleipnir::IMeasure.
| double Sleipnir::CMeasureRelativeAUC::Measure | ( | const float * | adX, |
| size_t | iN, | ||
| const float * | adY, | ||
| size_t | iM, | ||
| EMap | eMap = EMapNone, |
||
| const float * | adWX = NULL, |
||
| const float * | adWY = NULL |
||
| ) | const [virtual] |
Calculate the measure between two given vectors with optional element weights.
- Parameters:
-
adX First array of values. iN Length of first array. adY Second array of values. iM Length of second array. eMap Way in which returned value should be centered (implementation-specific). adWX If non-null, weights of elements in the first array. adWY If non-null, weights of elements in the second array.
- Returns:
- Measure calculated between the two input vectors and, optionally, weights.
- Remarks:
- Pretty much every implementation will puke if given bad input; bounds checking etc. is minimal.
Implements Sleipnir::IMeasure.
Definition at line 918 of file measure.cpp.
References Sleipnir::CMeta::GetNaN(), and Sleipnir::CMeta::IsNaN().
The documentation for this class was generated from the following files:
- src/measure.h
- src/measure.cpp
