la4j - Java的線性代數

la4j - 是一個單線程，開源的，純Java類庫，提供了線性代數的原語和算法。
以是它的一些主要特性：

• 沒有依賴和小規模 (~100kb jar)
• 簡約和完全面向對象的API
• 稀(CRS, CCS) 和 密(1D/2D arrays) 矩陣支持
• 線性方程組求解 (Gaussian, Jacobi, Zeidel, Square Root, Sweep and other)
• 矩陣分解 (Eigenvalues, SVD, QR, LU, Cholesky and other)
• MatrixMarket/CSV IO 矩陣和向量格式支持

    Factory basic2d = new Basic2DFactory();
    Factory crs = new CRSFactory();

    // a - is 3x3 dense 2D-array matrix
    Matrix a = basic2d.createMatrix(new double[][] {
    {1.0, 0.0, 0.0},
    {0.0, 5.0, 0.0},
    {0.0, 0.0, 9.0}
    });

    // b - is 3x4 sparse CRS matrix
    Matrix b = crs.createMatrix(3, 4);

    // c - is 5x5 random dense 2D-array matrix
    Matrix c = basic2d.createRandomMatrix(5, 5);

    // d - is 10x10 identity dense 2D-array matrix
    Matrix d = basic2d.createIdentityMatrix(10);

    // convert dense 2D-array to sparse CRS matrix
    Matrix e = a.copy(crs);

    // convert sparse CSR to dense 2D-array matrix
    Matrix f = b.copy(basic2d);

項目主頁：http://www.baiduhome.net/lib/view/home/1357741577590