private List <Point> GeneratePoints()
{
SymbolicExpression expression = SymbolicExpression.Parse(TextBoxInputFunc.Text);
Dictionary <string, FloatingPoint> variable = new Dictionary <string, FloatingPoint>();
variable.Add("x", 0);
List <Point> points = new List <Point>();
decimal step = 0;
decimal b = Convert.ToDecimal(TextBoxInputB.Text);
while (step <= b)
{
variable["x"] = (double)step;
points.Add(new Point((double)step, expression.Evaluate(variable).RealValue));
step += (decimal)0.1;
}
//for (int i = 0; i < count; i++)
//{
// variable["x"] = (double)step;
// points.Add(new Point((double)step, expression.Evaluate(variable).RealValue));
// step += (decimal)0.1;
//}
return(points);
}
static double MathParse(string function, double x)
{
SymbolicExpression expression = SymbolicExpression.Parse(function);
Dictionary <string, FloatingPoint> variables = new Dictionary <string, FloatingPoint>();
variables.Add("x", x);
return(expression.Evaluate(variables).RealValue);
}
private List <Point> GetPoints(double leftBorder, double rightBorder, double step)
{
SymbolicExpression expression = SymbolicExpression.Parse(TbFunction.Text);
Dictionary <string, FloatingPoint> variable = new Dictionary <string, FloatingPoint>();
variable.Add("x", 0);
List <Point> points = new List <Point>();
decimal x = (decimal)leftBorder;
for (double i = leftBorder; i < (rightBorder - leftBorder) / step; i++)
{
variable["x"] = (double)x;
points.Add(new Point((double)x, expression.Evaluate(variable).RealValue));
x += (decimal)step;
}
return(points);
}
private List <Point> GetPoints(int numberPoints, decimal step, string function)
{
SymbolicExpression expression = SymbolicExpression.Parse(function);
Dictionary <string, FloatingPoint> variable = new Dictionary <string, FloatingPoint>();
variable.Add("x", 0);
List <Point> points = new List <Point>();
decimal s = 0;
for (int i = 0; i < numberPoints; i++)
{
variable["x"] = (double)s;
points.Add(new Point((double)s, expression.Evaluate(variable).RealValue));
s += step;
}
return(points);
}
public static double EvaluateFunction(double t, double y, string function)
{
SymbolicExpression expression = Infix.ParseOrThrow(function);
Dictionary <string, FloatingPoint> variables = new Dictionary <string, FloatingPoint>
{
{ "t", t },
{ "y", y }
};
double result;
try
{
result = expression.Evaluate(variables).RealValue;
}
catch (Exception)
{
result = 0;
}
return(result);
}
private double GetFunctionValue(double x)
{
variable["x"] = x;
return(funcExpression.Evaluate(variable).RealValue);
}
private double GetFunctionValue(double x)
{
varDictionary[varName] = x;
return(expression.Evaluate(varDictionary).RealValue);
}