Example #1
0
func testDiagSolver(n int) {
	fmt.Println("Initializing Sparse matrix structure\n")
	tmp := cmplxSparse.New()

	matrixSize := int(2 * n)
	fmt.Println("Making sparse ", matrixSize, "x", matrixSize, " Hamiltonian tridiagonal matrix\n")
	cmplxSparse.MakeHamTriDiag(n, tmp)
	for idx0 := 0; idx0 < matrixSize; idx0++ {
		tmp.Data[idx0][2] -= complex(0.0, 5.0)
	}
	fmt.Println("Accessing matrix elements of Hamiltonian (m,n):")

	for idx0 := 0; idx0 < matrixSize; idx0++ {
		for idx1 := 0; idx1 < matrixSize; idx1++ {
			test := cmplxSparse.AccessMatrix(idx0, idx1, tmp)
			fmt.Printf("%f  ", test)
		}
		fmt.Printf("\n")
	}
	fmt.Printf("\n")

	tmp0 := cmplxSparse.SparseCopy(tmp)
	cmplxSparse.SparseDiagLU(tmp0)
	fmt.Println("Accessing matrix elements of LU (m,n):")
	for idx0 := 0; idx0 < matrixSize; idx0++ {
		for idx1 := 0; idx1 < matrixSize; idx1++ {
			test := cmplxSparse.AccessMatrix(idx0, idx1, tmp0)
			fmt.Printf("%f  ", test)
		}
		fmt.Printf("\n")
	}
	fmt.Printf("\n")

	InvBuffer := make([][]complex128, matrixSize)
	for idx0 := range InvBuffer {
		InvBuffer[idx0] = make([]complex128, matrixSize)
		for idx1 := range InvBuffer[idx0] {
			InvBuffer[idx0][idx1] = 0.0 + 0.0i
		}
	}

	for idx0 := range InvBuffer {
		InvBuffer[idx0][idx0] = 1.0 + 0.0i
		BufferMatrix := cmplxSparse.SparseDiagLinearSolver(tmp0, InvBuffer[idx0])
		InvBuffer[idx0] = BufferMatrix
	}

	fmt.Println("Accessing matrix elements of inverse (m,n):")

	for idx0 := range InvBuffer {
		for idx1 := range InvBuffer[idx0] {
			fmt.Printf("%.15g  ", InvBuffer[idx0][idx1])
		}
		fmt.Printf("\n")
	}
}
Example #2
0
func testLU(n int) {
	fmt.Println("Initializing Sparse matrix structure\n")
	tmp := cmplxSparse.New()

	matrixSize := int(2 * n)
	fmt.Println("Making sparse ", matrixSize, "x", matrixSize, " Hamiltonian tridiagonal matrix\n")
	cmplxSparse.MakeHamTriDiag(n, tmp)
	for idx0 := 0; idx0 < matrixSize; idx0++ {
		tmp.Data[idx0][2] -= complex(0.0, 5.0)
	}

	LU_mat := cmplxSparse.SparseCopy(tmp)
	cmplxSparse.SparseDiagLU(LU_mat)
	fmt.Println("Accessing matrix elements (m,n):")

	for idx0 := 0; idx0 < matrixSize; idx0++ {
		for idx1 := 0; idx1 < matrixSize; idx1++ {
			test := cmplxSparse.AccessMatrix(idx0, idx1, LU_mat)
			fmt.Printf("%f  ", test)
		}
		fmt.Printf("\n")
	}
	fmt.Println("\n")
}