TMtxExpression.DefineMatrix Method

Overload List

#	Signature	Description
1	TMatrixValue DefineMatrix(String AVarName)	Use internal matrix.
2	TMatrixValue DefineMatrix(String AVarName, TMtx mtx)	DefineMatrix defines new matrix variable.

Overload 1: TMatrixValue DefineMatrix(String AVarName)

Use internal matrix.

#	Name	Type	Description
1	AVarName	String

Returns: TMatrixValue

Overload 2: TMatrixValue DefineMatrix(String AVarName, TMtx mtx)

DefineMatrix defines new matrix variable.

#	Name	Type	Description
1	AVarName	String
2	mtx	TMtx	source TMtx

Returns: TMatrixValue

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. External matrix may be assigned as values holder. If external matrix is not assigned, internal matrix will be used.

Examples

using Dew.Math;
using Dew.Math.Units;

namespace Dew.Examples
{
    void Example(TMtxExpression MyParser)
    {
        // 1. Define variables
        TMatrixValue A = MyParser.DefineMatrix("A");
        TMatrixValue B = MyParser.DefineDouble("B");

        // 2. Set values
        A.Value.SetIt(2,2, false,new double[] {2,1,3,0});
        B.Value.SetIt(2,2, false,new double[] {1,0,1,1});

        // 3. Add formula and evaluate,
        MyParser.AddExpr("A+2*B");
        Matrix res = new Matrix(false,0,0)
        res = MyParser.EvaluateMatrix;
        // res = (4,1; 5,2)
    }
}