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## weka.core.pmml
Class BuiltInMath

    java.lang.Object
      weka.core.pmml.Function
          weka.core.pmml.BuiltInMath

All Implemented Interfaces:
  java.io.Serializable

    public class BuiltInMath

extends Function

Built-in function for min, max, sum, avg, log10, ln, sqrt, abs, exp, pow, threshold, floor, ceil and round.

Version:
  $Revision 1.0 $
Author:
  Mark Hall (mhall{[at]}pentaho{[dot]}com)
See Also:
  Serialized Form

Constructor Summary
`BuiltInMath(weka.core.pmml.BuiltInMath.MathFunc func)` Construct a new built-in pmml Math function.

Method Summary
`Attribute` | `getOutputDef()` Get the structure of the result produced by this function.
`java.lang.String[]` | `getParameterNames()` Returns an array of the names of the parameters expected as input by this function.
`double` | `getResult(double[] incoming)` Get the result of applying this function.
`void` | `setParameterDefs(java.util.ArrayList<Attribute> paramDefs)` Set the structure of the parameters that are expected as input by this function.
`java.lang.String` | `toString()`

Methods inherited from class weka.core.pmml.Function
`getFunction, getFunction, getName, toString`

Methods inherited from class java.lang.Object
`equals, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Constructor Detail

### BuiltInMath

    public BuiltInMath(weka.core.pmml.BuiltInMath.MathFunc func)

  Construct a new built-in pmml Math function.

  Parameters:
    `func` - the math function to use

Method Detail

### setParameterDefs

    public void setParameterDefs(java.util.ArrayList<Attribute> paramDefs)
                          throws java.lang.Exception

  Set the structure of the parameters that are expected as input by this function. This must be called before getOutputDef() is called.

  Specified by:
    `setParameterDefs` in class `Function`
  Parameters:
    `paramDefs` - the structure of the input parameters
  Throws:
    `java.lang.Exception` - if the number or types of parameters are not acceptable by this function

### getOutputDef

    public Attribute getOutputDef()

  Get the structure of the result produced by this function. Subclasses must implement.

  Specified by:
    `getOutputDef` in class `Function`
  Returns:
    the structure of the result produced by this function.

### getParameterNames

    public java.lang.String[] getParameterNames()

  Returns an array of the names of the parameters expected as input by this function. May return null if the function can accept an unbounded number of arguments.

  Specified by:
    `getParameterNames` in class `Function`
  Returns:
    an array of the parameter names (or null if the function can accept any number of arguments).

### getResult

    public double getResult(double[] incoming)
                     throws java.lang.Exception

  Get the result of applying this function.

  Specified by:
    `getResult` in class `Function`
  Parameters:
    `incoming` - the arguments to this function (supplied in order to match that of the parameter definitions
  Returns:
    the result of applying this function. When the optype is categorical or ordinal, an index into the values of the output definition is returned.
  Throws:
    `java.lang.Exception` - if there is a problem computing the result of this function

### toString

    public java.lang.String toString()

  Overrides:
    `toString` in class `Function`

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