protected override Function ComputePartialValue(IPartialEvaluator evaluator)
{
IPoint point = evaluator.Point;
if (point.ContainsVariable(this))
{
// Replace this variable by the specified value.
return point[this];
}
// This variable isn't replaced by a value. Just keep it.
return this;
}
protected override Function ComputePartialValue(IPartialEvaluator evaluator)
{
return Function.Sqrt(f.PartialValue(evaluator));
}
public PartialValueFunction(Function innerFunction, IPartialEvaluator partialEvaluator)
{
this.innerFunction = innerFunction;
this.partialEvaluator = partialEvaluator;
}
/// <summary>
/// Replaces a number of variables by fixed values.
/// </summary>
public static Function ComputePartialValue(Function function, IPartialEvaluator evaluator)
{
return function.ComputePartialValue(evaluator);
}
/// <summary>
/// Replaces a number of variables by fixed values. Override this to implement.
/// </summary>
protected virtual Function ComputePartialValue(IPartialEvaluator evaluator)
{
// Use slow and inefficient implementation using PartialValueFunction by default. Override to provide a more efficient implementation.
return new PartialValueFunction(this, evaluator);
}
/// <summary>
/// Substitutes a number of variables by function values. The chain rule is applied. Returns a function of the remaining variables and the variables introduced implicitly through the substitution.
/// </summary>
public Function Substitute(IPartialEvaluator evaluator)
{
throw new NotImplementedException();
//return evaluator.Evaluate(this);
}
/// <summary>
/// Replaces a number of variables by fixed values. Returns a function of the remaining variables.
/// </summary>
public Function PartialValue(IPartialEvaluator evaluator)
{
return evaluator.Evaluate(this);
}
protected override Function ComputePartialValue(IPartialEvaluator evaluator)
{
return this;
}
protected override Function ComputePartialValue(IPartialEvaluator evaluator)
{
return f.PartialValue(evaluator) - g.PartialValue(evaluator);
}
