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## de.grogra.xl.lang
Interface DoubleToDouble

All Known Subinterfaces:
  Collector, Spectrum

All Known Implementing Classes:
  Collector3d, Collector3dList, CollectorW3d, Spectrum3d, Spectrum3f

    public interface DoubleToDouble

Instances of `DoubleToDouble` represent functions which take `double`s as input and return values of type `double`. Such instances are created by lambda expressions of the XL programming language, e.g., `DoubleToDouble f = double x => double` some expression containing x`;`.

Author:
  Ole Kniemeyer

Method Summary
`double` | `evaluateDouble(double x)` Computes the value of this function at `x`.

Method Detail

### evaluateDouble

    double evaluateDouble(double x)

  Computes the value of this function at `x`.

  Parameters:
    `x` - where the function is to be evaluated
  Returns:
    function value at `x`

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