Package org.esa.snap.core.util.math

Class MatrixLookupTable

java.lang.Object

org.esa.snap.core.util.math.MatrixLookupTable

public class MatrixLookupTable
extends Object

The class MatrixLookupTable performs the function of multilinear interpolation for matrix lookup tables with an arbitrary number of dimensions.

The implementation simply delegates to an VectorLookupTable.

Constructor Summary

Constructors

Constructor	Description
MatrixLookupTable(int m, int n, MatrixFactory matrixFactory, double[] values, double[]... dimensions)
MatrixLookupTable(int m, int n, MatrixFactory matrixFactory, double[] values, IntervalPartition... dimensions)
MatrixLookupTable(int m, int n, MatrixFactory matrixFactory, float[] values, float[]... dimensions)
MatrixLookupTable(int m, int n, MatrixFactory matrixFactory, float[] values, IntervalPartition... dimensions)
MatrixLookupTable(int m, int n, MatrixFactory matrixFactory, VectorLookupTable vectorLookupTable)

Method Summary

Modifier and Type	Method	Description
IntervalPartition	getDimension(int i)	Returns the the ith dimension associated with the lookup table.
int	getDimensionCount()	Returns the number of dimensions associated with the lookup table.
IntervalPartition[]	getDimensions()	Returns the dimensions associated with the lookup table.
double[][]	getValues(double... coordinates)	Returns an interpolated value matrix for the given coordinates.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MatrixLookupTable

public MatrixLookupTable(int m,
                         int n,
                         MatrixFactory matrixFactory,
                         double[] values,
                         IntervalPartition... dimensions)

MatrixLookupTable

public MatrixLookupTable(int m,
                         int n,
                         MatrixFactory matrixFactory,
                         float[] values,
                         IntervalPartition... dimensions)

MatrixLookupTable

public MatrixLookupTable(int m,
                         int n,
                         MatrixFactory matrixFactory,
                         double[] values,
                         double[]... dimensions)

MatrixLookupTable

public MatrixLookupTable(int m,
                         int n,
                         MatrixFactory matrixFactory,
                         float[] values,
                         float[]... dimensions)

MatrixLookupTable

public MatrixLookupTable(int m,
                         int n,
                         MatrixFactory matrixFactory,
                         VectorLookupTable vectorLookupTable)

Method Detail

getDimensionCount

public final int getDimensionCount()

Returns the number of dimensions associated with the lookup table.

Returns:

the number of dimensions.

getDimensions

public final IntervalPartition[] getDimensions()

Returns the dimensions associated with the lookup table.

Returns:

the dimensions.

getDimension

public final IntervalPartition getDimension(int i)

Returns the the ith dimension associated with the lookup table.

Parameters:

i - the index number of the dimension of interest

Returns:

the ith dimension.

getValues

public final double[][] getValues(double... coordinates)
                           throws IllegalArgumentException

Returns an interpolated value matrix for the given coordinates.

Parameters:

coordinates - the coordinates of the lookup point.

Returns:

the interpolated value matrix.

Throws:

IllegalArgumentException - if the length of the coordinates array is not equal to the number of dimensions associated with the lookup table.

NullPointerException - if the coordinates array is null.