Package org.ejml.alg.dense.decomposition.lu

Examples of org.ejml.alg.dense.decomposition.lu.LUDecompositionAlt.computeDeterminant()

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            DenseMatrix64F A = RandomMatrices.createRandom(N,N,rand);

            double unrolled = UnrolledDeterminantFromMinor.det(A);
            LUDecompositionAlt alg = new LUDecompositionAlt();
            assertTrue( alg.decompose(A) );
            double expected = alg.computeDeterminant();

            assertEquals(expected,unrolled,1e-8);
        }
    }
}
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            DenseMatrix64F A = RandomMatrices.createRandom(width,width,rand);

            LUDecompositionAlt lu = new LUDecompositionAlt();
            lu.decompose(A);

            double luVal = lu.computeDeterminant();

            DeterminantFromMinor minor = new DeterminantFromMinor(width);
            double minorVal = minor.compute(new DenseMatrix64F(width,width, true, A.data));

            assertEquals(luVal,minorVal,1e-6);
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            }
        } else {
            LUDecompositionAlt alg = new LUDecompositionAlt();
            if( !alg.decompose(mat) )
                return 0.0;
            return alg.computeDeterminant();
        }
    }

    /**
     * <p>
 
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        double total = 0;

        for( int i = 0; i < numTrials; i++ ) {
            alg.decompose(mat);
            total += alg.computeDeterminant();
        }

//        System.out.println("   total = "+total);
        long after = System.currentTimeMillis();
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