| public static Multiply ( Matrix a, Matrix b ) : Matrix | ||
| a | Matrix | The first matrix. |
| b | Matrix | The second matrix. |
| 리턴 | Matrix | |
public void Multiply()
{
double[][] matrixData1 =
{
new[] { 1.0, 4.0 },
new[] { 2.0, 5.0 },
new[] { 3.0, 6.0 }
};
double[][] matrixData2 =
{
new[] { 7.0, 8.0, 9.0 },
new[] { 10.0, 11.0, 12.0 }
};
double[][] matrixData3 =
{
new[] { 47.0, 52.0, 57.0 },
new[] { 64.0, 71.0, 78.0 },
new[] { 81.0, 90.0, 99.0 }
};
var matrix1 = new Matrix(matrixData1);
var matrix2 = new Matrix(matrixData2);
var matrix3 = new Matrix(matrixData3);
Matrix result = MatrixMath.Multiply(matrix1, matrix2);
Assert.IsTrue(result.Equals(matrix3));
}
public void MultiplyScalar()
{
double[][] data =
{
new[] { 2.0, 4.0 },
new[] { 6.0, 8.0 }
};
var matrix = new Matrix(data);
Matrix result = MatrixMath.Multiply(matrix, 2.0);
Assert.AreEqual(4.0, result[0, 0]);
}
public void MatrixMultiply()
{
double[][] a =
{
new[] { 1.0, 0.0, 2.0 },
new[] { -1.0, 3.0, 1.0 }
};
double[][] b =
{
new[] { 3.0, 1.0 },
new[] { 2.0, 1.0 },
new[] { 1.0, 0.0 }
};
double[][] c =
{
new[] { 5.0, 1.0 },
new[] { 4.0, 2.0 }
};
var matrixA = new Matrix(a);
var matrixB = new Matrix(b);
var matrixC = new Matrix(c);
var result = (Matrix)matrixA.Clone();
result.ToString();
result = MatrixMath.Multiply(matrixA, matrixB);
Assert.IsTrue(result.Equals(matrixC));
double[][] a2 =
{
new[] { 1.0, 2.0, 3.0, 4.0 },
new[] { 5.0, 6.0, 7.0, 8.0 }
};
double[][] b2 =
{
new[] { 1.0, 2.0, 3.0 },
new[] { 4.0, 5.0, 6.0 },
new[] { 7.0, 8.0, 9.0 },
new[] { 10.0, 11.0, 12.0 }
};
double[][] c2 =
{
new[] { 70.0, 80.0, 90.0 },
new[] { 158.0, 184.0, 210.0 }
};
matrixA = new Matrix(a2);
matrixB = new Matrix(b2);
matrixC = new Matrix(c2);
result = MatrixMath.Multiply(matrixA, matrixB);
Assert.IsTrue(result.Equals(matrixC));
matrixB.Clone();
try
{
MatrixMath.Multiply(matrixB, matrixA);
Assert.IsTrue(false);
}
catch (MatrixError)
{
}
}