Java Matrix类代码示例

import org.ujmp.core.Matrix; //导入依赖的package包/类
public static Matrix ImportMatrix(String txtPath) {
    List<String> list = BResult_delete4.GetNameOrder(txtPath);
    int m = list.size();
    String[] listStrings = list.get(0).split(" ");
    int n = listStrings.length;
    Matrix matrix = Matrix.Factory.ones(m, n);
    int i = 0;
    for (String string : list) {
        listStrings = list.get(i).split(" ");
        int j = 0;
        for (String str : listStrings) {
            matrix.setAsDouble(Double.parseDouble(str), i, j);
            j++;
        }
        i++;
    }
    return matrix;
}
 

import org.ujmp.core.Matrix; //导入依赖的package包/类
/**
 * 用于计算一个矩阵的元素中，绝对值最大的那个值。
 *
 * @param matrix
 * @return
 */
public static double AbsMax(Matrix matrix) {
    double maxValue = 0.0;
    long[] matrix_size = matrix.getSize();
    long m = matrix_size[0];
    long n = matrix_size[1];
    for (int i = 0; i < m; i++) {
        for (int j = 0; j < n; j++) {
            double absValue = matrix.getAsDouble(i, j);
            if (absValue < 0.0)
                absValue = absValue * (-1);
            if (absValue > maxValue)
                maxValue = absValue;
        }
    }
    return maxValue;
}
 

import org.ujmp.core.Matrix; //导入依赖的package包/类
/**
 * 用于把矩阵输出到文件中
 *
 * @param matrix
 * @param outputPath
 */
public static void printMatrix(Matrix matrix, String outputPath) {
    long[] size = matrix.getSize();
    long m = size[0]; long n = size[1];
    String cont = "";
    DecimalFormat df = new DecimalFormat("#0.000000");
    for (int i = 0; i < m; i++) {
        for (int j = 0; j < n; j++) {
            cont = cont + df.format(matrix.getAsDouble(i,j)) + " ";
        }
        cont = cont + "\n";
    }
    try {
        FileUtils.write(new File(outputPath), cont, "utf-8");
    } catch (IOException e) {
        e.printStackTrace();
    }
}
 

import org.ujmp.core.Matrix; //导入依赖的package包/类
/**
 * 用于把矩阵按行归一化
 *
 * @param oriMatrix
 * @return
 */
public static Matrix NormByRow(Matrix oriMatrix) {
    long[] size = oriMatrix.getSize();
    long m = size[0];
    long n = size[1];
    Matrix normedMatrix = Matrix.Factory.zeros(m, n);
    for (int i = 0; i < m; i++) {
        double summary = 0.0;
        for (int j = 0; j < n; j++) {
            summary = summary + oriMatrix.getAsDouble(i, j);
        }
        if (summary == 0)
            continue;
        else {
            for (int j = 0; j < n; j++) {
                normedMatrix.setAsDouble(oriMatrix.getAsDouble(i, j) / summary, i, j);
            }
        }
    }
    return normedMatrix;
}
 

import org.ujmp.core.Matrix; //导入依赖的package包/类
public SparseMatrix pca(SparseMatrix A, int dim) {

		logger.info("Type 'pca' started (target dimensions = " + dim + ").");

		centerData(A);

		logger.info("Computing SVD...");
		Matrix[] svd = A.svd();
		Matrix U = svd[0];
		Matrix S = svd[1];

		logger.info("Reducing U to Uk...");
		Matrix Uk = U.select(Ret.NEW, "*;0-" + dim);

		logger.info("Reducing S to Sk...");
		Matrix Sk = S.select(Ret.NEW, "0-" + dim + ";0-" + dim);

		logger.info("Computing principal components...");
		return (SparseMatrix) Uk.mtimes(Sk);
	}
 

import org.ujmp.core.Matrix; //导入依赖的package包/类
public synchronized Matrix plus(Ret returnType, boolean ignoreNaN, Matrix m) {
	if (returnType == Ret.ORIG) {
		try {
			outputBB.rewind();
			outputBB.putInt(PLUSMATRIX);
			outputStream.write(outputBuffer, 0, outputBB.position());
			outputStream.flush();
			fireValueChanged();
			return this;
		} catch (IOException e) {
			throw new RuntimeException(e);
		}
	} else {
		return super.plus(returnType, ignoreNaN, m);
	}
}
 

import org.ujmp.core.Matrix; //导入依赖的package包/类
public void trainOne(Matrix input, Matrix sampleWeight, Matrix desiredOutput) {
	addDesiredOutputMatrix(desiredOutput.toRowVector(Ret.NEW));
	if (sampleWeight == null) {
		sampleWeight = Matrix.Factory.linkToValue(1.0);
	}
	setSampleWeight(sampleWeight.doubleValue());
	predictOne(input);
	getOutputErrorAlgorithm().calculate();

	for (int i = networkLayers.size() - 1; i != -1; i--) {
		networkLayers.get(i).calculateBackward();
	}

	for (int i = networkLayers.size() - 1; i != -1; i--) {
		networkLayers.get(i).calculateWeightUpdate();
	}

}
 

import org.ujmp.core.Matrix; //导入依赖的package包/类
public static BigDecimal normF(Matrix m) {
	long rows = m.getRowCount();
	long cols = m.getColumnCount();
	BigDecimal result = BigDecimal.ZERO;
	for (long ro = 0; ro < rows; ro++) {
		for (long c = 0; c < cols; c++) {
			BigDecimal b = m.getAsBigDecimal(ro, c);
			BigDecimal temp = BigDecimal.ZERO;
			if (MathUtil.isGreater(result.abs(), b.abs())) {
				temp = MathUtil.divide(b, result);
				temp = MathUtil.times(result.abs(), MathUtil.sqrt(MathUtil.plus(BigDecimal.ONE,
						MathUtil.times(temp, temp))));
			} else if (!MathUtil.equals(BigDecimal.ZERO, b)) {
				temp = MathUtil.divide(result, b);
				temp = MathUtil.times(b.abs(), MathUtil.sqrt(MathUtil.plus(BigDecimal.ONE,
						MathUtil.times(temp, temp))));
			} else {
				temp = BigDecimal.ZERO;
			}
			result = temp;
		}
	}
	return result;
}
 

import org.ujmp.core.Matrix; //导入依赖的package包/类
@Test
public final void testInvRandSmall() throws Exception {
	Matrix m1 = createMatrixWithAnnotation(10, 10);

	do {
		m1.randn(Ret.ORIG);
	} while (m1.isSingular());

	Matrix m2 = m1.inv();
	Matrix m3 = m1.mtimes(m2);
	Matrix eye = DenseDoubleMatrix2D.Factory.eye(m1.getRowCount(), m1.getColumnCount());
	assertEquals(getLabel(), 0.0, eye.minus(m3).getEuklideanValue(), TOLERANCE);

	if (m1 instanceof Erasable) {
		((Erasable) m1).erase();
	}
	if (m2 instanceof Erasable) {
		((Erasable) m2).erase();
	}
	if (m3 instanceof Erasable) {
		((Erasable) m3).erase();
	}
	if (eye instanceof Erasable) {
		((Erasable) eye).erase();
	}
}
 

import org.ujmp.core.Matrix; //导入依赖的package包/类
public ListDataSet calculate(ListDataSet dataSet) throws Exception {
	product1ToIds.setLabel("Product 1 Ids");
	product2ToIds.setLabel("Product 2 Ids");

	Matrix product1Count = new CountMatrix(product1ToIds);
	product1Count.setLabel("Product 1 Count");

	Matrix product2Count = new CountMatrix(product2ToIds);
	product2Count.setLabel("Product 2 Count");

	for (int r = 0; r < dataSet.size(); r++) {

		if (r % 1000 == 0) {
			System.out.println(r + " of " + dataSet.size());
		}
		RelationalSample s = (RelationalSample) dataSet.get(r);
		Collection<?> products = s.getObjects();
		if (products.size() != 0) {
			addProduct1Count(products, r);
			addProduct2Count(products, r);
		}
	}

	return calculateP(minSupport);
}
 

import org.ujmp.core.Matrix; //导入依赖的package包/类
public ListDataSet CountActive(int number) {
	ListDataSet ds = labeledDataSet("Count " + number);
	double possibilites = Math.pow(2, number);
	for (int i = 0; i < possibilites; i++) {
		BitSet bits = BitSet.valueOf(new long[] { i });
		Sample sample = Sample.Factory.labeledSample("" + i);
		Matrix input = Matrix.Factory.zeros(1, number);
		Matrix target = Matrix.Factory.zeros(1, number + 1);
		int count = 0;
		for (int j = 0; j < number; j++) {
			if (bits.get(j)) {
				input.setAsDouble(1, 0, j);
				count++;
			}
		}
		target.setAsDouble(1, 0, count);
		sample.put(Sample.INPUT, input);
		sample.put(Sample.TARGET, target);
		ds.add(sample);
	}
	return ds;
}
 

import org.ujmp.core.Matrix; //导入依赖的package包/类
public Selection(Matrix m, Collection<? extends Number>... selection) {
	super(m);
	this.selection = new long[selection.length][];
	if (selection[ROW] != null) {
		this.selection[ROW] = MathUtil.collectionToLongArray(selection[ROW]);
	}
	if (selection[COLUMN] != null) {
		this.selection[COLUMN] = MathUtil.collectionToLongArray(selection[COLUMN]);
	}
	if (this.selection[ROW] != null && this.selection[COLUMN] != null) {
		size = new long[] { this.selection[ROW].length, this.selection[COLUMN].length };
	} else {
		if (this.selection[ROW] == null) {
			size = new long[] { getSource().getRowCount(), this.selection[COLUMN].length };
		} else {
			size = new long[] { this.selection[ROW].length, getSource().getColumnCount() };
		}
	}
	createAnnotation();
}
 

import org.ujmp.core.Matrix; //导入依赖的package包/类
/**
 * 导出矩阵到XLS EXCEL文件
 * @param matrix
 * @param file
 * @param sheetName
 * @throws IOException
 */
public static void exportToXLSFile(final Matrix matrix, final File file,
												String sheetName) throws IOException
{
	final Workbook workbook = new HSSFWorkbook();
	//调用exportToExcelFile将矩阵方法导出到Excel文件
	exportToExcelFile(workbook, matrix, file, sheetName);

	//final FileOutputStream fileOutputStream = new FileOutputStream(file);
	//final BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(fileOutputStream);
	//workbook.write(fileOutputStream);
	
	//bufferedOutputStream.close();
	//fileOutputStream.close();
}
 

import org.ujmp.core.Matrix; //导入依赖的package包/类
/**
 * 导出矩阵到XLSX EXCEL文件
 * @param matrix
 * @param file
 * @param sheetName
 * @throws IOException
 */
public static void exportToXLSXFile(final Matrix matrix, final File file, 
										final String sheetName)throws IOException
{
	final Workbook workbook = new XSSFWorkbook();
	//调用exportToExcelFile将矩阵方法导出到Excel文件
	exportToExcelFile(workbook, matrix, file, sheetName);

	//final FileOutputStream fileOutputStream = new FileOutputStream(file);
	//final BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(fileOutputStream);
	//workbook.write(fileOutputStream);
	
	//bufferedOutputStream.close();
	//fileOutputStream.close();
}
 

import org.ujmp.core.Matrix; //导入依赖的package包/类
public static void ExportImplementer(final String netXML, 
																		final String odXML, 
																		final String LocalNetXML) throws IOException
{
	/////////////////////////////////////////////////////////////////
	//存储从XML文件中读取的信息到矩阵
	ImportSumoImplement importSumo = new ImportSumoImplement(netXML, odXML);
	Matrix matrixJunction = importSumo.getMatrixJunction();
	Matrix matrixEdge = importSumo.getMatrixEdge();
	Matrix matrixConnection = importSumo.getMatrixConnection();
	
	List<String> originList = importSumo.getOriginList();
	List<String> destinationList = importSumo.getDestinationList();
	
	//存储网络信息到本地Network当中
	//------------------------------------------------
	long exportXMLStartTime=System.currentTimeMillis();   //获取开始时间
	exportXML = new ExportNetworkToXML();
	
	addJunctionToNetwork(matrixJunction, matrixConnection);		//添加路口到网络中
	addExternalLinkToNetwork(matrixEdge);                  					//添加外部连接到路网中
	addODMatrix(originList, destinationList);			   							//添加ODList到路网中
	exportXML.createXMLFile(LocalNetXML);  //"localnetwork\\localnetwork.xml"
	long exportXMLEndTime=System.currentTimeMillis(); 				//获取结束时间
	System.out.println("本地XML路网导出时间： " + (exportXMLEndTime-exportXMLStartTime) +"ms");
	
	//导出本地路网信息到本地EXCEL文件
	//-----------------------------------------------
	//long exportStartTime=System.currentTimeMillis();   //获取开始时间
	//ExportNetworkToExcel.exportToXLSXFile(matrixJunction, "localnetwork\\Junction.xlsx", "Junction");
	//ExportNetworkToExcel.exportToXLSXFile(matrixEdge, "localnetwork\\Edge.xlsx", "Edge");
	//ExportNetworkToExcel.exportToXLSXFile(matrixConnection, "localnetwork\\Connection.xlsx", "Connection");
	//long exportEndTime=System.currentTimeMillis(); //获取结束时间
	//System.out.println("本地EXCEL路网导出时间： " + (exportEndTime-exportStartTime) +"ms");
}