Examples of cern.colt.matrix.linalg.LUDecompositionQuick.solve()

Class cern.colt.matrix.linalg.LUDecompositionQuick

Examples of cern.colt.matrix.linalg.LUDecompositionQuick.solve()

cern.colt.matrix.linalg.LUDecompositionQuick.solve()
Solves the system of equations A*X = B (in-place). Upon return B is overridden with the result X, such that L*U*X = B(piv). @param B A vector with B.size() == A.rows(). @exception IllegalArgumentException if B.size() != A.rows(). @exception IllegalArgumentException if A is singular, that is, if !isNonsingular(). @exception IllegalArgumentException if A.rows() < A.columns().

    verifyAxb(s);
    
    // Test 2
    LUDecompositionQuick solver = new LUDecompositionQuick();
    solver.decompose(testMatrix);solver.setLU(testMatrix);
    solver.solve(x);
    for(int i=0;i<testMatrix.rows();++i)
      Assert.assertEquals(i+1, x.getQuick(i),comparisonAccuracy);
    verifyAxb(s);


    // Test 3

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    checkForCorrectException(new whatToRun() {
      public void run() throws NumberFormatException {
        LUDecompositionQuick coltSolver = new LUDecompositionQuick();
        coltSolver.decompose(matrix);coltSolver.setLU(matrix);
        coltSolver.solve(x);
      }
    }, IllegalArgumentException.class,"singular");    


    checkForCorrectException(new whatToRun() {
      public void run() throws NumberFormatException {

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    long tmStarted = new Date().getTime();
    LUDecompositionQuick coltSolver = new LUDecompositionQuick();
    coltSolver.decompose(matrix);coltSolver.setLU(matrix);
    
    DoubleMatrix1D vector = b.copy();
    coltSolver.solve(vector);
    long tmFinished = new Date().getTime();
    System.out.println(" time taken: "+((double)tmFinished-tmStarted)/1000);
    verifyAxb(matrix, b, vector);
    
    tmStarted = new Date().getTime();

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    coltSolver.decompose(matrix);coltSolver.setLU(matrix);
    DoubleMatrix1D vector = DoubleFactory1D.dense.make(matrix.rows(), 0);
    
    try
    {
      coltSolver.solve(vector);
    }
    catch(IllegalArgumentException ex)
    {
      if (ex.getMessage().contains("singular"))
        Assert.assertTrue(singular);

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  {
    LUDecompositionQuick solver = new LUDecompositionQuick();
    DoubleMatrix2D matrix = toDoubleMatrix2D();
    solver.decompose(matrix);solver.setLU(matrix);
    DoubleMatrix1D result = toDoubleMatrix1D();
    solver.solve(result);result.toArray(j_x);    
  }
  
  /** The following two variables are not currently in use.
   * The amount of memory currently allocated on the solver. Negative will force allocation. This is necessary for initialisation. */
  //private static int currentMaxSize = -1;

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