org.knime.base.node.mine.sota.logic

## Class SotaFuzzyMath

• ```public final class SotaFuzzyMath
extends Object```
Author:
Kilian Thiel, University of Konstanz
• ### Method Summary

All Methods
Modifier and Type Method and Description
`static double[]` ```getCenterOfAllCoreRegions(DataRow cells, DataTableSpec spec)```
Computes the center vector of all core regions of the given FuzzyCells as a double array.
`static double` `getCenterOfCoreRegion(FuzzyIntervalValue val)`
Computes the center of the FuzzyCells core region, by adding MaxCore and MinCore and dividing the result by 2.
`static double` ```getCoreDilatationToOtherCore(DataRow cells1, DataRow cells2, DataTableSpec spec)```
Computes the core dilatation of a core region to another core region.
`static double` ```getMaxCoreDilatation(DataRow cells, DataTableSpec spec)```
Approximates dilatation of Core region, by using Pythagoras.
`static double` `getMaxCoreDilatation(FuzzyIntervalValue[] vals)`
Approximates dilatation of Core region, by using Pythagoras.
`static double` `getMaxCoreDistanceToCenter(FuzzyIntervalValue val)`
Computes the maximal distance between the center of the core region and the end of the core region, by deviding difference of MaxCore and MinCore by 2, and returns it.
`static int` ```getNumberOfFuzzyCells(DataRow cells, DataTableSpec spec)```
Counts the number of FuzzyIntervalValues of given row and returns it.
• ### Methods inherited from class java.lang.Object

`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`
• ### Method Detail

• #### getMaxCoreDistanceToCenter

`public static double getMaxCoreDistanceToCenter(FuzzyIntervalValue val)`
Computes the maximal distance between the center of the core region and the end of the core region, by deviding difference of MaxCore and MinCore by 2, and returns it.
Parameters:
`val` - the Fuzzy Cell Value to compute center of core region for
Returns:
the center of the given FuzzyCells core region
• #### getCenterOfCoreRegion

`public static double getCenterOfCoreRegion(FuzzyIntervalValue val)`
Computes the center of the FuzzyCells core region, by adding MaxCore and MinCore and dividing the result by 2.
Parameters:
`val` - the Fuzzy Cell to compute center of gravity for
Returns:
the center of gravity of a core region
• #### getMaxCoreDilatation

`public static double getMaxCoreDilatation(FuzzyIntervalValue[] vals)`
Approximates dilatation of Core region, by using Pythagoras. Dilatation d = (sum(ai))^(1/2), with ai = (Cmax - Cmin) / 2. If cell-array length is less or equal 0, than -1 is returned.
Parameters:
`vals` - array of cells of N-dimensional Fuzzy Set to approximate core dilatation
Returns:
core dilatation of given FuzzyIntervalCells. If cell-array length is less or equal 0, than -1 is returned.
• #### getMaxCoreDilatation

```public static double getMaxCoreDilatation(DataRow cells,
DataTableSpec spec)```
Approximates dilatation of Core region, by using Pythagoras. Dilatation d = (sum(ai))^(1/2), with ai = (Cmax - Cmin) / 2. -1 is returned if the given DataRow contains no FuzzyIntervalCells.
Parameters:
`cells` - row which contains FuzzyIntervalCells
`spec` - spec of the row, to see which cells are FuzzyIntervalCells
Returns:
core dilatation of given FuzzyIntervalCells. If the row contains no FuzzyIntervalCells -1 is returned.
• #### getCenterOfAllCoreRegions

```public static double[] getCenterOfAllCoreRegions(DataRow cells,
DataTableSpec spec)```
Computes the center vector of all core regions of the given FuzzyCells as a double array. If the row contains no FuzzyCell `null` is returned.
Parameters:
`cells` - FuzzyCells to compute the center of the core regions
`spec` - DataTableSpec of rows, to see which cells are FuzzyIntervalCells
Returns:
the vector of the center of all core regions of the given FuzzyCells as a double array. If row contains no FuzzyCells `null` is returned.
• #### getNumberOfFuzzyCells

```public static int getNumberOfFuzzyCells(DataRow cells,
DataTableSpec spec)```
Counts the number of FuzzyIntervalValues of given row and returns it.
Parameters:
`cells` - DataRow to count number of FuzzyIntervalValues
`spec` - DataTableSpec of given row to get information about Types of cell in row
Returns:
the number of FuzzyIntervalValues of given row
• #### getCoreDilatationToOtherCore

```public static double getCoreDilatationToOtherCore(DataRow cells1,
DataRow cells2,
DataTableSpec spec)```
Computes the core dilatation of a core region to another core region.
Parameters:
`cells1` - core region to compute dilataion for
`cells2` - core region which indicates the direction
`spec` - DataTableSpec of row to get information about types of DataCells
Returns:
dilatation of core region of cells1, with respect to the direction indicated by cells2