private void EvaluateButton_Click(object sender, RoutedEventArgs e)
{
CurrentExpression = SymbolicVariable.Parse(ExpressionTextBox.Text);
ExpressionResult.Text = CurrentExpression.ToString();
D3Chart.Title = CurrentExpression.ToString();
ParametersPanel.Children.Clear();
// create dynamic sliders for the expression.
foreach (var p in CurrentExpression.InvolvedSymbols)
{
Slider s = new Slider()
{
Name = p + "Slider", Tag = p
};
s.Minimum = double.Parse(MinimumTextBox.Text);
s.Maximum = double.Parse(MaximumTextBox.Text);
s.Value = s.Minimum;
s.ValueChanged += new RoutedPropertyChangedEventHandler <double>(Sliders_ValueChanged);
ParametersPanel.Children.Add(new TextBlock {
Text = p
});
ParametersPanel.Children.Add(s);
}
lgraph.Points.Clear();
}
/// <summary>
/// Differentiate operation for function.
/// </summary>
/// <param name="value">object of <see cref="QsScalar"/> that hold <see cref="AnyQuantity<SymbolicVariable>"/></param>
/// <returns></returns>
public override QsValue DifferentiateOperation(QsValue value)
{
QsScalar sval = (QsScalar)value;
if (sval.ScalarType == ScalarTypes.SymbolicQuantity)
{
var dsv = sval.SymbolicQuantity.Value;
string fname = "_";
string WholeFunction = string.Empty;
if (this.FunctionBodyToken[0].TokenClassType == typeof(CurlyBracketGroupToken))
{
// vector differentiation
// take every term in the vector and differentiate it
var vcs = QsVar.VectorComponents(this.FunctionBodyToken[0]);
StringBuilder sc = new StringBuilder();
sc.Append(fname + "(" + RemoveRedundantParameters(this.ParametersNames) + ") = ");
sc.Append("{ ");
foreach (var c in vcs)
{
SymbolicVariable nsv = SymbolicVariable.Parse(c);
int times = (int)dsv.SymbolPower;
while (times > 0)
{
nsv = nsv.Differentiate(dsv.Symbol);
times--;
}
sc.Append(nsv.ToString());
sc.Append(" ");
}
sc.Append("}");
WholeFunction = sc.ToString();
}
else
{
SymbolicVariable nsv = ToSymbolicVariable();
int times = (int)dsv.SymbolPower;
while (times > 0)
{
nsv = nsv.Differentiate(dsv.Symbol);
times--;
}
WholeFunction = fname + "(" + RemoveRedundantParameters(this.ParametersNames) + ") = " + nsv.ToString();
}
return(QsFunction.ParseFunction(QsEvaluator.CurrentEvaluator, WholeFunction));
}
else
{
return(base.DifferentiateOperation(value));
}
}