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SciPy Reference Guide, Release 0.8.dev Notes Right hand side of the linear system. Has shape (N,) or (N,1). THIS FUNCTION IS EXPERIMENTAL AND SUBJECT TO CHANGE! References Solution of sparse indefinite systems of linear equations, C. C. Paige and M. A. Saunders (1975), SIAM J. Numer. Anal. 12(4), pp. 617-629. http://www.stanford.edu/group/SOL/software/minres.html This file is a translation of the following MATLAB implementation: http://www.stanford.edu/group/SOL/software/minres/matlab/ qmr(A, b, x0=None, tol=1.0000000000000001e-05, maxiter=None, xtype=None, M1=None, M2=None, callback=None) Use Quasi-Minimal Residual iteration to solve A x = b See Also: Parameters A : {sparse matrix, dense matrix, LinearOperator} LinearOperator The N-by-N matrix of the linear system. b : {array, matrix} Right hand side of the linear system. Has shape (N,) or (N,1). splu(A, permc_spec=2, diag_pivot_thresh=1.0, drop_tol=0.0, relax=1, panel_size=10) A linear solver, for a sparse, square matrix A, using LU decomposition where L is a lower triangular matrix and U is an upper triagular matrix. Returns a factored_lu object. (scipy.sparse.linalg.dsolve._superlu.SciPyLUType) See scipy.sparse.linalg.dsolve._superlu.dgstrf for more info. spsolve(A, b, permc_spec=2) Solve the sparse linear system Ax=b test Run tests for module using nose. Parameters label : {‘fast’, ‘full’, ‘’, attribute identifier}, optional Identifies the tests to run. This can be a string to pass to the nosetests executable with the ‘-A’ option, or one of several special values. Special values are: ‘fast’ - the default - which corresponds to the nosetests -A option of ‘not slow’. ‘full’ - fast (as above) and slow tests as in the ‘no -A’ option to nosetests - this is the same as ‘’. None or ‘’ - run all tests. attribute_identifier - string passed directly to nosetests as ‘-A’. verbose : int, optional Verbosity value for test outputs, in the range 1-10. Default is 1. 398 Chapter 3. Reference
Notes extra_argv : list, optional List with any extra arguments to pass to nosetests. doctests : bool, optional If True, run doctests in module. Default is False. coverage : bool, optional SciPy Reference Guide, Release 0.8.dev If True, report coverage of NumPy code. Default is False. (This requires the ‘coverage module: Returns result : object ‘_). Returns the result of running the tests as a nose.result.TextTestResult object. Each NumPy module exposes test in its namespace to run all tests for it. For example, to run all tests for numpy.lib: >>> np.lib.test() Examples >>> result = np.lib.test() Running unit tests for numpy.lib ... Ran 976 tests in 3.933s OK >>> result.errors [] >>> result.knownfail [] use_solver(**kwargs) Valid keyword arguments with defaults (other ignored): useUmfpack = True assumeSortedIndices = False The default sparse solver is umfpack when available. This can be changed by passing useUmfpack = False, which then causes the always present SuperLU based solver to be used. Umfpack requires a CSR/CSC matrix to have sorted column/row indices. If sure that the matrix fulfills this, pass assumeSortedIndices=True to gain some speed. 3.16 Spatial algorithms and data structures (scipy.spatial) Warning: This documentation is work-in-progress and unorganized. 3.16. Spatial algorithms and data structures (scipy.spatial) 399
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