SignalProcessing.PolynomialSampleGenerator

java.lang.Object
- ptolemy.math.SignalProcessing.PolynomialSampleGenerator

All Implemented Interfaces:: DoubleUnaryOperation

Enclosing class:: SignalProcessing

public static class SignalProcessing.PolynomialSampleGenerator
extends java.lang.Object
implements DoubleUnaryOperation

This class generates samples of a polynomial. The function computed is:

  h(t) = a₀ + a₁t + a₂t² + ...
         + a_n-1t^n-1

or

  h(t) = a₀ + a₁t^-1
         + a₂t^-2 + ...
         + a_n-1t^-(n-1)

depending on the direction specified.

- Constructor Summary
  
  Constructors
  Constructor Description
  
  PolynomialSampleGenerator(double[] coefficients, int direction)
  Construct a PolynomialSampleGenerator.
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  double operate(double time)
  Return a sample of the line, sampled at the specified time.
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - PolynomialSampleGenerator
```
public PolynomialSampleGenerator(double[] coefficients,
                                 int direction)
```
    Construct a PolynomialSampleGenerator. The input argument is an array of doubles a[0] = a₀ .. a[n-1] = a_n-1 used to compute the formula : h(t) = a₀ + a₁t + ... + a_n-1t^n-1 The array of doubles must be of length 1 or greater. The array of doubles is copied, so the user is free to modify it after construction. The exponents on t in the above equation will all be negated if the direction parameter is -1; otherwise the direction parameter should be 1.
    
    Parameters:
    
    coefficients - An array of double coefficients.
    
    direction - 1 for positive exponents, -1 for negative exponents.
- Method Detail
  - operate
```
public final double operate(double time)
```
    Return a sample of the line, sampled at the specified time. Note that at time = 0, with a negative direction, the sample will be positive or negative infinity.
    
    Specified by:
    
    operate in interface DoubleUnaryOperation
    
    Parameters:
    
    time - The operand.
    
    Returns:
    
    The results of the operation.