private Function CalculateAnalyticDerivative()
{
ExpressionTree diffTree = AnalyticDifferentiator.Differentiate(_expressionTree, _expressionTree.Variables[0]);
switch (diffTree.Variables.Length)
{
case 0:
return(new Constant(diffTree.ToString()));
case 1:
return(new Explicit2DFunction(diffTree));
default:
throw new InvalidOperationException();
}
}
private Function CalculateAnalyticDerivative()
{
string formula =
String.Format("-(({0})/({1}))",
AnalyticDifferentiator.Differentiate(_expressionTree, _expressionTree.Variables[0]),
AnalyticDifferentiator.Differentiate(_expressionTree, _expressionTree.Variables[1]));
ExpressionTree diffTree = new ExpressionTree(formula);
switch (diffTree.Variables.Length)
{
case 0:
return(new Constant(diffTree.ToString()));
case 1:
return(new Explicit2DFunction(diffTree.ToString()));
case 2:
return(new Implicit2DFunction(diffTree.ToString()));
default:
throw new InvalidOperationException();
}
}