org.apache.commons.math3.analysis.integration

## Interface UnivariateIntegrator

- All Known Implementing Classes:
    BaseAbstractUnivariateIntegrator, IterativeLegendreGaussIntegrator, LegendreGaussIntegrator, MidPointIntegrator, RombergIntegrator, SimpsonIntegrator, TrapezoidIntegrator

      public interface UnivariateIntegrator

  Interface for univariate real integration algorithms.
  Since:
    1.2

- - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `double` | `getAbsoluteAccuracy()` Get the absolute accuracy.
    `int` | `getEvaluations()` Get the number of function evaluations of the last run of the integrator.
    `int` | `getIterations()` Get the number of iterations of the last run of the integrator.
    `int` | `getMaximalIterationCount()` Get the upper limit for the number of iterations.
    `int` | `getMinimalIterationCount()` Get the min limit for the number of iterations.
    `double` | `getRelativeAccuracy()` Get the relative accuracy.
    `double` | `integrate(int maxEval, UnivariateFunction f, double min, double max)` Integrate the function in the given interval.

- - ### Method Detail

    - #### getRelativeAccuracy

          double getRelativeAccuracy()

      Get the relative accuracy.
      Returns:
        the accuracy

    - #### getAbsoluteAccuracy

          double getAbsoluteAccuracy()

      Get the absolute accuracy.
      Returns:
        the accuracy

    - #### getMinimalIterationCount

          int getMinimalIterationCount()

      Get the min limit for the number of iterations.
      Returns:
        the actual min limit

    - #### getMaximalIterationCount

          int getMaximalIterationCount()

      Get the upper limit for the number of iterations.
      Returns:
        the actual upper limit

    - #### integrate

          double integrate(int maxEval,
                         UnivariateFunction f,
                         double min,
                         double max)
                           throws TooManyEvaluationsException,
                                  MaxCountExceededException,
                                  MathIllegalArgumentException,
                                  NullArgumentException

      Integrate the function in the given interval.
      Parameters:
        `maxEval` - Maximum number of evaluations.
        `f` - the integrand function
        `min` - the lower bound for the interval
        `max` - the upper bound for the interval
      Returns:
        the value of integral
      Throws:
        `TooManyEvaluationsException` - if the maximum number of function evaluations is exceeded
        `MaxCountExceededException` - if the maximum iteration count is exceeded or the integrator detects convergence problems otherwise
        `MathIllegalArgumentException` - if `min > max` or the endpoints do not satisfy the requirements specified by the integrator
        `NullArgumentException` - if `f` is `null`.

    - #### getEvaluations

          int getEvaluations()

      Get the number of function evaluations of the last run of the integrator.
      Returns:
        number of function evaluations

    - #### getIterations

          int getIterations()

      Get the number of iterations of the last run of the integrator.
      Returns:
        number of iterations

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