Examples of BandMatrix

no.uib.cipr.matrix.BandMatrix

Banded matrix. The banded matrix is a useful sparse structure for many kinds of direct computations, however it should only be used if the band is sufficiently narrow as wide bands actually wastes both memory and compute time. The matrix

a₁₁	a₁₂
a₂₁	a₂₂	a₂₃
a₃₁	a₃₂	a₃₃	a₃₄
	a₄₂	a₄₃	a₄₄	a₄₅
		a₅₃	a₅₄	a₅₅

has two lower diagonals and one upper diagonal. It will be stored in the array

a₁₁

a₂₁

a₃₁

a₂₁

a₂₂

a₃₂

a₄₂

a₂₃

a₃₃

a₄₃

a₅₃

a₃₄

a₄₄

a₅₄

a₄₅

a₅₅

Empty cells are allocated, but never referenced.

    @Override
    protected void setUp() throws Exception {
        int n = Utilities.getInt(1, max);
        kl = Math.min(n, Utilities.getInt(bmax));
        ku = Math.min(n, Utilities.getInt(bmax));
        A = new BandMatrix(n, kl, kl + ku);
        Utilities.bandPopulate(A, kl, ku);
        Utilities.addDiagonal(A, 1);
        while (Utilities.singular(A))
            Utilities.addDiagonal(A, 1);

    @Override
    protected void createPrimary() throws Exception {
        int n = Utilities.getInt(1, max);
        int kl = Math.min(Utilities.getInt(max), Math.max(n - 1, 0));
        int ku = Math.min(Utilities.getInt(max), Math.max(n - 1, 0));
        A = new BandMatrix(n, kl, ku);
        Ad = Utilities.bandPopulate(A, kl, ku);
    }

        Ad = Utilities.bandPopulate(A, kl, ku);
    }


    @Override
    public void testTransposeInplace() {
        BandMatrix B = (BandMatrix) A;
        if (B.numSubDiagonals() == B.numSuperDiagonals())
            super.testTransposeInplace();
    }

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Examples of BandMatrix

Examples of no.uib.cipr.matrix.BandMatrix

Examples of no.uib.cipr.matrix.BandMatrix

Examples of no.uib.cipr.matrix.BandMatrix