com.singularsys.jep.functions

## Class StrictNaturalLogarithm

- java.lang.Object
- - com.singularsys.jep.functions.PostfixMathCommand
  - - com.singularsys.jep.functions.UnaryFunction
    - - com.singularsys.jep.functions.StrictNaturalLogarithm

- All Implemented Interfaces:
    PostfixMathCommandI, RealUnaryFunction, java.io.Serializable

      public class StrictNaturalLogarithm
      extends UnaryFunction
      implements RealUnaryFunction

  A strict version of Natural logarithm. For negative Double arguments his class will return Double.NaN. The standard NaturalLogarithm class will convert treat the argument and compute the complex logarithm.
  See Also:
    Serialized Form

- - ### Field Summary

    - ### Fields inherited from class com.singularsys.jep.functions.PostfixMathCommand

      `curNumberOfParameters, name, NaN, numberOfParameters`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `StrictNaturalLogarithm()` Standard base-e logarithm.
    `StrictNaturalLogarithm(double base)` Logarithm to any other base.

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `java.lang.Object` | `eval(java.lang.Object arg)`
    `double` | `evaluate(double val)`
    `java.lang.Object` | `ln(java.lang.Object param)`

    - ### Methods inherited from class com.singularsys.jep.functions.UnaryFunction

      `run`

    - ### Methods inherited from class com.singularsys.jep.functions.PostfixMathCommand

      `asArray, asBool, asDouble, asInt, asLong, asStrictInt, asString, checkNumberOfParameters, getName, getNumberOfParameters, setCurNumberOfParameters, setName, toString, toString`

    - ### Methods inherited from class java.lang.Object

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

- - ### Constructor Detail

    - #### StrictNaturalLogarithm

          public StrictNaturalLogarithm(double base)

      Logarithm to any other base. new StrictNaturalLogarithm(10) for base 10, new StrictNaturalLogarithm(2) for base 2.
      Parameters:
        `base` - base to use

    - #### StrictNaturalLogarithm

          public StrictNaturalLogarithm()

      Standard base-e logarithm.

  - ### Method Detail

    - #### eval

          public java.lang.Object eval(java.lang.Object arg)
                                throws EvaluationException

      Specified by:
        `eval` in class `UnaryFunction`
      Throws:
        `EvaluationException`

    - #### ln

          public java.lang.Object ln(java.lang.Object param)
                              throws EvaluationException

      Throws:
        `EvaluationException`

    - #### evaluate

          public double evaluate(double val)

      Specified by:
        `evaluate` in interface `RealUnaryFunction`

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