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Substitute

 Method with 4 overloads

• Substitute​(System.​String,​AngouriMath.​Entity.​Variable,​AngouriMath.​Entity)

  Summary

  Subsitutes a variable by replacing all its occurances with the given value
  

  Parameter "expr"

  The expression where to substitute the variables

  Parameter "var"

  A variable to substitute

  Parameter "value"

  A value to substitute var

  Returns

  Expression with substituted the variable

  Example

  Substitution replaces nodes and computes nothing:
  

  Console.WriteLine("x ^ 2 + x".Substitute("x", 3));
  Console.WriteLine("x ^ 2 + x".Substitute("x", 3).Evaled);

  
  Prints
  

  3 ^ 2 + 3
  12

• Substitute​(System.​String,​System.​ValueTuple{AngouriMath.​Entity,​AngouriMath.​Entity,​AngouriMath.​Entity,​AngouriMath.​Entity},​System.​ValueTuple{AngouriMath.​Entity,​AngouriMath.​Entity,​AngouriMath.​Entity,​AngouriMath.​Entity})

  Summary

  Replaces x.x1 with value.v1 and
  x.x2 with value.v2 and
  x.x3 with value.v3 and
  x.x4 with value.v4
  

  Example

  Console.WriteLine("a + b + c + d".Substitute(("a", "b", "c", "d"), (1, 2, 3, 4)));
  Console.WriteLine("a + b + c + d".Substitute(("a", "b", "c", "d"), (1, 2, 3, 4)).Evaled);

  
  Prints
  

  1 + 2 + 3 + 4
  10

• Substitute​(System.​String,​System.​ValueTuple{AngouriMath.​Entity,​AngouriMath.​Entity,​AngouriMath.​Entity},​System.​ValueTuple{AngouriMath.​Entity,​AngouriMath.​Entity,​AngouriMath.​Entity})

  Summary

  Replaces x.x1 with value.v1 and
  x.x2 with value.v2 and
  x.x3 with value.v3
  

  Example

  Instantiating the coefficients of a quadratic and then solving it:
  

  var quadratic = "a x2 + b x + c".Substitute(("a", "b", "c"), (1, -3, 2));
  Console.WriteLine(quadratic);
  Console.WriteLine(quadratic.SolveEquation("x"));

  
  Prints
  

  1 * x ^ 2 + (-3) * x + 2
  { 1, 2 }

• Substitute​(System.​String,​System.​ValueTuple{AngouriMath.​Entity,​AngouriMath.​Entity},​System.​ValueTuple{AngouriMath.​Entity,​AngouriMath.​Entity})

  Summary

  Replaces x.x1 with value.v1 and
  x.x2 with value.v2
  

  Example

  The replacements happen one after another and each sees the result of the last, so
  this does not swap two variables — the first substitution puts y where
  x was, and the second then rewrites every y:
  

  Console.WriteLine("x - y".Substitute(("x", "y"), ("y", "x")));

  
  Prints
  

  x - x