PiecewisePolynomialResult2D (OpenGamma Strata)

java.lang.Object
- com.opengamma.strata.math.impl.interpolation.PiecewisePolynomialResult2D

```
public class PiecewisePolynomialResult2D
extends Object
```
Result of 2D interpolation.
Result by piecewise polynomial f(x0,x1) containing _knots0: Positions of knots in x0 direction _knots1: Positions of knots in x1 direction _coefMatrix: Coefficient matrix whose (i,j) element is a DoubleMatrix containing coefficients for the square, _knots0_i < x0 < _knots0_{i+1}, _knots1_j < x1 < _knots1_{j+1}, Each DoubleMatrix is c_ij where f(x0,x1) = sum_{i=0}^{order0-1} sum_{j=0}^{order1-1} coefMat_{ij} (x0-knots0_i)^{order0-1-i} (x1-knots1_j)^{order0-1-j} _nIntervals: Number of intervals in x0 direction and x1 direction, respectively, which should be (Number of knots) - 1 _order: Number of coefficients in polynomial in terms of x0 and x1, respectively, which is equal to (polynomial degree) + 1

Constructor Summary

Constructors
Constructor	Description
`PiecewisePolynomialResult2D(DoubleArray knots0, DoubleArray knots1, DoubleMatrix[][] coefMatrix, int[] order)`	Creates an instance.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`DoubleMatrix[][]`	`getCoefs()`	Access _coefMatrix.
`DoubleArray`	`getKnots0()`	Access _knots0.
`DoubleArray`	`getKnots1()`	Access _knots1.
`ArrayList<DoubleArray>`	`getKnots2D()`	Access _knots0 and _knots1.
`int[]`	`getNumberOfIntervals()`	Access _nIntervals.
`int[]`	`getOrder()`	Access _order.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - PiecewisePolynomialResult2D
```
public PiecewisePolynomialResult2D(DoubleArray knots0,
                                   DoubleArray knots1,
                                   DoubleMatrix[][] coefMatrix,
                                   int[] order)
```
    Creates an instance.
    
    Parameters:
    
    knots0 - The knots in the x0 direction
    
    knots1 - The knots in the x1 direction
    
    coefMatrix - The coefficient matrix
    
    order - The order of the polynomial
- Method Detail
  - getKnots2D
```
public ArrayList<DoubleArray> getKnots2D()
```
    Access _knots0 and _knots1.
    
    Returns:
    
    _knots0 and _knots1 contained in a ArrayList
  - getKnots0
```
public DoubleArray getKnots0()
```
    Access _knots0.
    
    Returns:
    
    _knots0
  - getKnots1
```
public DoubleArray getKnots1()
```
    Access _knots1.
    
    Returns:
    
    knots1
  - getCoefs
```
public DoubleMatrix[][] getCoefs()
```
    Access _coefMatrix.
    
    Returns:
    
    _coefMatrix
  - getNumberOfIntervals
```
public int[] getNumberOfIntervals()
```
    Access _nIntervals.
    
    Returns:
    
    _nIntervals
  - getOrder
```
public int[] getOrder()
```
    Access _order.
    
    Returns:
    
    _order