| public InsertMatrixAt ( Matrix passedMatrix, int destinationRow, int destinationColumn ) : Matrix | ||
| passedMatrix | Matrix | |
| destinationRow | int | |
| destinationColumn | int | |
| return | Matrix | |
public void Matrix_RemoveRowsAndColumnsTest()
{
Matrix testMatrix = new Matrix(3,3);
testMatrix.InsertMatrixAt(Matrix.IdentityMatrix(2), 1, 1);
int[] rowsToRemove = { 0 };
int[] columnsToRemove = { 0, 1 };
Matrix actualMatrix = testMatrix.RemoveRows(rowsToRemove);
actualMatrix = actualMatrix.RemoveColumns(columnsToRemove);
Matrix expectedMatrix = new Matrix(2, 1);
expectedMatrix.SetElement(1, 0, 1.0);
(actualMatrix == expectedMatrix).Should().BeTrue();
}
/// <summary>
/// Strips out all the elements from each submatrix and creates an equivalent matrix.
/// For a more detailed explanation, see http://stackoverflow.com/questions/24678305/converting-a-2d-array-of-2d-arrays-into-a-single-2d-array
/// </summary>
public Matrix ConvertToMatrix()
{
//Creates a matrix big enough to hold all of the values in the MatricesMatrix
Matrix returnMatrix = new Matrix(this.TotalRows(), this.TotalColumns());
int nextRow = 0;
int nextCol = 0;
//Loop through the rows of this matrices matrix
for (int row = 0; row < this.NumberOfRows; row++)
{
//Loop through the columns of this matrices matrix
for (int col = 0; col < this.NumberOfColumns; col++)
{
Matrix currentMatrix = this.GetElement(row, col);
returnMatrix.InsertMatrixAt(currentMatrix, nextRow, nextCol);
nextCol += this.GetColumnWidth(col); //The next column of the Matrix should be inserted a distance away that is equal to the total width of the current MatricesMatrix column
}
nextRow += this.GetRowHeight(row); //The next row of the Matrix should be inserted a distance away that is equal to the total height of the current MatricesMatrix row
nextCol = 0;
}
return returnMatrix;
}
public void Matrix_InsertMatrixTest()
{
Matrix originalMatrix = new Matrix(3,3);
double[] matrix1Row1 = { 1, 5, 6 };
double[] matrix1Row2 = { 2, 4, 7 };
double[] matrix1Row3 = { 3, 6, 8 };
originalMatrix.SetRow(0, matrix1Row1);
originalMatrix.SetRow(1, matrix1Row2);
originalMatrix.SetRow(2, matrix1Row3);
Matrix matrixToInsert = Matrix.IdentityMatrix(2);
Matrix expectedResult = new Matrix(3,3);
double[] expectedResultRow1 = { 1, 5, 6 };
double[] expectedResultRow2 = { 1, 0, 7 };
double[] expectedResultRow3 = { 0, 1, 8 };
expectedResult.SetRow(0, expectedResultRow1);
expectedResult.SetRow(1, expectedResultRow2);
expectedResult.SetRow(2, expectedResultRow3);
Matrix actualResult = originalMatrix.InsertMatrixAt(matrixToInsert, 1, 0);
bool equalityResult = (actualResult == expectedResult);
equalityResult.Should().BeTrue();
}
// --------------------------------------------------------------------------------------------------------------
/// <summary>
/// Solves for the column matrix x, where Ax = b.
/// </summary>
public Matrix SystemSolve(Matrix columnMatrix)
{
var augmentedMatrix = new Matrix(this.NumberOfRows, this.NumberOfColumns + 1);
augmentedMatrix.InsertMatrixAt(this, 0, 0);
augmentedMatrix.InsertMatrixAt(columnMatrix, 0, this.NumberOfColumns);
var solution = SolveMatrix(augmentedMatrix.As2DArray);
return new Matrix(solution);
}