You are here: Symbol Reference > Dew Namespace > Dew.Math Namespace > Classes > TMtxExpression Class > TMtxExpression Methods > TMtxExpression.DefineDouble Method
Dew Math for .NET
ContentsIndexHome
PreviousUpNext
TMtxExpression.DefineDouble Method
TMtxExpression Class  TMtxExpression Members  Dew.Math Namespace  TMtxExpression Methods  Example  See Also
Collapse All

Defines new double variable.

Syntax
C#
Visual Basic
public TDoubleValue DefineDouble([In] string AVarName);
Remarks

If variable with name AVarName already was definded, it will be redefined and all expressions which contain the symbol AVarName will be recompiled before the next evaluation.

See Also
Example

Use parser to evaluate the "Sqrt(X*X + Y*Y)" formula where x=3 and y=4.

using Dew.Math; using Dew.Math.Units; namespace Dew.Examples() { void Example() { // 1. Define variables TDoubleValue x = MyParser.DefineDouble("x"); TDoubleValue y = MyParser.DefineDouble("y"); // 2. Set values x.DoubleValue = 3.0; y.DoubleValue = 4.0; // 3. Add formula and evaluate, MyParser.AddExpr("Sqrt(x*x+y*y)"); double res = MyParser.EvaluateDouble(); // res = 5 } }
Group
Links
Copyright (c) 1999-2024 by Dew Research. All rights reserved.
Contents | Index | Home
What do you think about this topic? Send feedback!