cholesky_solve¶
- pydl.pydlutils.bspline.cholesky_solve(a, bb)[source]¶
Solve the equation \(A x = b\) where
a
is a lower Cholesky-banded matrix.In the
bspline
machinery,a
needs to be padded. This function should only used with the output ofcholesky_band()
, to ensure the proper padding ona
. Otherwise the computation is delegated toscipy.linalg.cho_solve_banded()
.- Parameters:
- a
numpy.ndarray
Lower Cholesky decomposition of \(A\) in \(A x = b\).
- bb
numpy.ndarray
\(b\) in \(A x = b\).
- a
- Returns:
numpy.ndarray
The solution, padded to be the same shape as
bb
.