/// <summary>
/// Computes the gradient of the compiled term at the given point.
/// </summary>
/// <param name="arg">The point at which to differentiate.</param>
/// <param name="parameters">The parameter values</param>
/// <returns>A tuple, where the first item is the gradient at <paramref name="arg"/> and the second item is
/// the value at <paramref name="arg"/>. That is, the second value is the same as running <see cref="Evaluate"/> on
/// <paramref name="arg"/> and <paramref name="parameters"/>.</returns>
/// <remarks>The number at <c>arg[i]</c> is the value assigned to the variable <c>Variables[i]</c>.</remarks>
public static Tuple <double[], double> Differentiate(this IParametricCompiledTerm term, IReadOnlyList <double> arg,
IReadOnlyList <double> parameters)
{
var grad = new double[arg.Count];
var val = term.Differentiate(arg, parameters, grad);
return(Tuple.Create(grad, val));
}
public Result(IParametricCompiledTerm lagrangian, ICompiledTerm[] constraints)
{
this.lagrangian = lagrangian;
this.constraints = constraints;
}