Package ptolemy.math

Class 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 + ...
             + an-1tn-1
      
    or
      h(t) = a0 + a1t-1
             + a2t-2 + ...
             + an-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] = an-1 used to compute the formula : h(t) = a0 + a1t + ... + an-1tn-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.