public Matrix matrixAccuralize() { // 精确化矩阵
int i, j;
Matrix matrix = new Matrix(this);
for (i = 0; i < matrix.getLine(); i++)
for (j = 0; j < matrix.getRow(); j++)
if (Math.abs(matrix.getElement(i, j)) <= matrix.getAccuracy()) matrix.setElement(i, j, 0.0);
return matrix;
}
public static void matrixToPanel(JTextField[] jtfMatrix, Matrix matrix) {
int i, j;
DecimalFormat df = new DecimalFormat(String.valueOf(matrix.getAccuracy()).replace('1', '0'));
for (i = 0; i < matrix.getLine(); i++)
for (j = 0; j < matrix.getRow(); j++) {
jtfMatrix[i * matrix.getRow() + j].setText(
String.valueOf(df.format(matrix.getElement(i, j))));
}
}
public static Matrix matrixMinus(Matrix matrix1, Matrix matrix2) { // 矩阵减法
int i, j;
Matrix matrix = new Matrix();
for (i = 0; i < matrix1.getLine(); i++)
for (j = 0; j < matrix1.getRow(); j++)
matrix.setElement(i, j, matrix1.getElement(i, j) - matrix2.getElement(i, j));
matrix.setLine(matrix1.getLine());
matrix.setRow(matrix1.getRow());
matrix.setAccuracy(matrix1.getAccuracy());
return matrix;
}
public static Matrix matrixCopy(Matrix matrix) { // 矩阵复制
int i, j;
Matrix matrix_copy = new Matrix();
matrix_copy.setLine(matrix.getLine());
matrix_copy.setRow(matrix.getRow());
matrix_copy.setAccuracy(matrix.getAccuracy());
matrix_copy.setName(matrix.getName());
for (i = 0; i < matrix.getLine(); i++)
for (j = 0; j < matrix.getRow(); j++) matrix_copy.setMatrixArray(matrix.getMatrixArray());
return matrix_copy;
}
public int matrixRank() // 矩阵的秩
{
int rank = 0, i, j;
Matrix matrix = new Matrix();
matrix = matrixLineSimplify();
for (i = 0; i < matrix.getLine(); i++)
for (j = 0; j < matrix.getRow(); j++)
if (Math.abs(matrix.getElement(i, j)) > matrix.getAccuracy()) {
rank++;
break;
}
return rank;
}
public static Matrix matrixMultiply(Matrix matrix1, Matrix matrix2) { // 矩阵乘法
int i, j, k;
Matrix matrix = new Matrix();
matrix.setLine(matrix1.getLine());
matrix.setRow(matrix2.getRow());
matrix.setAccuracy(matrix1.getAccuracy());
for (i = 0; i < matrix.getLine(); i++)
for (j = 0; j < matrix.getRow(); j++) matrix.setElement(i, j, 0.0);
for (i = 0; i < matrix.getLine(); i++)
for (j = 0; j < matrix.getRow(); j++)
for (k = 0; k < matrix1.getRow(); k++)
matrix.setElement(
i, j, matrix.getElement(i, j) + matrix1.getElement(i, k) * matrix2.getElement(k, j));
return matrix;
}
public Matrix(Matrix matrix) {
this.matrixArray = Matrix.matrixArrayCopy(matrix.getMatrixArray());
this.line = matrix.getLine();
this.row = matrix.getRow();
this.accuracy = matrix.getAccuracy();
}