public BinaryTree MakePolonomialFunction(double[] coef)
{
root = null;
int p = coef.Length - 1;
for (int i = 0; i < coef.Length; i++)
{
if (i == 0)
{
digits d = new digits(coef[i].ToString());
power power = new power(new variables("x"), new digits(p.ToString()));
multi m = new multi(d, power);
root = m;
p--;
}
else
{
digits d = new digits(coef[i].ToString());
power power = new power(new variables("x"), new digits(p.ToString()));
multi m = new multi(d, power);
plus plus = new plus(root, m);
root = plus;
p--;
}
}
root = root.Simplify();
return(this);
}
public override Node Simplify()
{
this.leftChild = this.leftChild.Simplify();
this.rightChild = this.rightChild.Simplify();
if (this.leftChild is digits && this.leftChild.inside == "1")
{
return(this.rightChild);
}
else if (this.rightChild is digits && this.rightChild.inside == "1")
{
return(this.leftChild);
}
else if ((this.rightChild is digits && this.rightChild.inside == "0") || (this.leftChild is digits && this.leftChild.inside == "0"))
{
return(new digits("0"));
}
else if (this.rightChild is digits && this.leftChild is digits)
{
return(new digits((Convert.ToInt32(this.leftChild.inside) * Convert.ToInt32(this.rightChild.inside)).ToString()));
}
else if (this.rightChild is e && this.leftChild is e)
{
plus p = new plus(this.leftChild.leftChild, this.rightChild.leftChild);
return(new e(p));
}
else if (this.rightChild is minus && this.leftChild is minus && this.rightChild.rightChild is null && this.leftChild.rightChild is null)
{
multi m = new multi(this.rightChild.leftChild, this.leftChild.leftChild);
return(m);
}
return(this);
}
public BinaryTree CreateMcLaurinAn(string value, int n)
{
root = null;
Node root1 = this.CreateBinaryTree(root, ref value);
digits d = new digits(root1.Calculations(0).ToString());
_ fac = new _(new digits("0"));
digits d1 = new digits(fac.Calculations(0).ToString());
division div = new division(d, d1);
power pow = new power(new variables("x"), new digits("0"));
multi m = new multi(div, pow);
root = m;
for (int i = 1; i <= n; i++)
{
root1 = root1.Derivative();
digits dd = new digits(root1.Calculations(0).ToString());
_ fac1 = new _(new digits($"{i}"));
digits dd1 = new digits(fac1.Calculations(0).ToString());
division div1 = new division(dd, dd1);
power pow1 = new power(new variables("x"), new digits($"{i}"));
multi m1 = new multi(div1, pow1);
plus p = new plus(root, m1);
root = p;
}
return(this);
}
public override Node Derivative()
{
multi f1 = new multi(this.leftChild.Derivative(), this.rightChild);
multi f2 = new multi(this.leftChild, this.rightChild.Derivative());
plus p = new plus(f1, f2);
return(p);
}
public BinaryTree CreateMcLaurinPlotN(string v, int n)
{
double[] functions = new double[n + 1];
int power = 0;
root = null;
Node root1 = this.CreateBinaryTree(root, ref v);
while (power <= n)
{
double result = 0;
int[] coef = this.coef(power);
int powerindex = power;
for (int i = 0; i <= power; i++)
{
result = result + coef[i] * root1.Calculations(powerindex * this.almostzero);
powerindex--;
}
if (power == 0)
{
functions[power] = result;
digits d = new digits(result.ToString());
_ fac = new _(new digits("0"));
digits d1 = new digits(fac.Calculations(0).ToString());
division div = new division(d, d1);
power pow = new power(new variables("x"), new digits("0"));
multi m = new multi(div, pow);
root = m;
}
else
{
functions[power] = result / Math.Pow(this.almostzero, power);
digits dd = new digits(Math.Round(functions[power], 2).ToString());
_ fac1 = new _(new digits($"{power}"));
digits dd1 = new digits(fac1.Calculations(0).ToString());
division div1 = new division(dd, dd1);
power pow1 = new power(new variables("x"), new digits($"{power}"));
multi m1 = new multi(div1, pow1);
plus p = new plus(root, m1);
root = p;
}
power++;
}
//double d = root.Calculations(x + this.almostzero);
//double d1 = root.Calculations(x);
//double d2 = (d - d1);
//double d3 = d2 / this.almostzero;
return(this);
}
public override Node Derivative()
{
plus p = new plus(leftChild.Derivative(), rightChild.Derivative());
return(p);
}
public BinaryTree MakePolonomialFunctionLagrange(int[] points)
{
root = null;
int[] x = new int[points.Length / 2];
int[] y = new int[points.Length / 2];
int xat = 0;
int yat = 0;
for (int i = 0; i < points.Length; i++)
{
if (i % 2 == 0)
{
x[xat] = points[i];
xat++;
}
else
{
y[yat] = points[i];
yat++;
}
}
for (int i = 0; i < x.Length; i++)
{
int count = 0;
int time = 0;
double total = 1;
Node temp = null;
while (count < x.Length)
{
if (i != count)
{
total = total * (x[i] - x[count]);
time++;
if (time == 1)
{
variables var = new variables("x");
digits d = new digits(x[count].ToString());
minus m = new minus(var, d);
temp = m;
}
else
{
variables var = new variables("x");
digits d = new digits(x[count].ToString());
minus m = new minus(var, d);
temp = new multi(temp, m);
}
}
count++;
}
total = y[i] / total;
digits d1 = new digits(total.ToString());
multi m1 = new multi(temp, d1);
temp = m1;
if (i == 0)
{
root = temp;
}
else
{
plus p = new plus(root, temp);
root = p;
}
}
root = root.Simplify();
return(this);
}