org.esa.beam.util.math
Class FXYSum.BiQuadric

java.lang.Object
  org.esa.beam.util.math.FXYSum
      org.esa.beam.util.math.FXYSum.BiQuadric

Enclosing class:

FXYSum

public static final class FXYSum.BiQuadric
extends FXYSum

Provides an optimized computeZ method for bi-quadric polynomials (order = 2+2).

See Also:

FXYSum.FXY_BI_QUADRATIC

Nested Class Summary

Nested classes/interfaces inherited from class org.esa.beam.util.math.FXYSum

FXYSum.BiCubic, FXYSum.BiLinear, FXYSum.BiQuadric, FXYSum.Cubic, FXYSum.Linear, FXYSum.Quadric

Field Summary

Fields inherited from class org.esa.beam.util.math.FXYSum

FXY_4TH, FXY_BI_4TH, FXY_BI_CUBIC, FXY_BI_LINEAR, FXY_BI_QUADRATIC, FXY_CUBIC, FXY_LINEAR, FXY_QUADRATIC

Constructor Summary

FXYSum.BiQuadric()

FXYSum.BiQuadric(double[] coefficients)

Method Summary

double

computeZ(double x, double y) Computes this sum of function terms z(x,y) = sum(c[i] * f[i](x,y), i=0, n-1).

Methods inherited from class org.esa.beam.util.math.FXYSum

appendCFunctionCodeBody, appendCFunctionCodeEnd, appendCFunctionCodePart, appendCFunctionCodeStart, approximate, computeZ, createCFunctionCode, createCopy, createFXYSum, getCoefficients, getFunctions, getMaxError, getNumTerms, getOrder, getRootMeanSquareError

Methods inherited from class java.lang.Object

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

Constructor Detail

FXYSum.BiQuadric

public FXYSum.BiQuadric()

FXYSum.BiQuadric

public FXYSum.BiQuadric(double[] coefficients)

Method Detail

computeZ

public double computeZ(double x,
                       double y)

Description copied from class: FXYSum

Computes this sum of function terms z(x,y) = sum(c[i] * f[i](x,y), i=0, n-1). The method will return zero unless the FXYSum.approximate(double[][], int[]) is called in order to set the coefficient vector c.

Overrides:

computeZ in class FXYSum

Parameters:

x - the x value

y - the y value

Returns:

the z value

See Also:

FXYSum.computeZ(FXY[], double[], double, double)