scipy.linalg.lapack.cpbsv#
- scipy.linalg.lapack.cpbsv(ab, b, lower=0, ldab=ab.shape[0], overwrite_ab=0, overwrite_b=0) = <flapack function cpbsv>#
Solve a positive definite band system by Cholesky factorization (LAPACK
cpbsv).- Parameters:
- abndarray
The band of the matrix, shape
(kd + 1, n): the order n and the bandwidth kd are both read off ab itself.- bndarray
Right-hand side(s) of shape
(n, nrhs).- lowerint, optional
If nonzero, the lower triangle of a is referenced and the factor is lower triangular; otherwise the upper. Default is 0.
- ldabint, optional
Leading dimension of ab. It must equal
ab.shape[0]; the argument exists only because the.pyfexposed it. Default isab.shape[0].- overwrite_abint, optional
If nonzero, ab may be overwritten in place. Default is 0.
- overwrite_bint, optional
If nonzero, b may be overwritten in place. Default is 0.
- Returns:
- cndarray
The banded Cholesky factor, overwriting ab.
- xndarray
Solution of the system, overwriting b.
- infoint
0 on success; if negative, the
-info-th argument had an illegal value.