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bundles / scipy latest / scipy / spatial / transform / _rotation_spline / _create_block_3_diagonal_matrix

function

scipy.spatial.transform._rotation_spline:_create_block_3_diagonal_matrix

source: /scipy/spatial/transform/_rotation_spline.py :192

Signature

def   _create_block_3_diagonal_matrix ( A ,  B ,  d )

Summary

Create a 3-diagonal block matrix as banded.

Extended Summary

The matrix has the following structure:

DB... ADB.. .ADB. ..ADB ...AD

The blocks A, B and D are 3-by-3 matrices. The D matrices has the form d * I.

Parameters

A : ndarray, shape (n, 3, 3)

Stack of A blocks.

B : ndarray, shape (n, 3, 3)

Stack of B blocks.

d : ndarray, shape (n + 1,)

Values for diagonal blocks.

Returns

: ndarray, shape (11, 3 * (n + 1))

Matrix in the banded form as used by scipy.linalg.solve_banded.

Aliases

  • scipy.spatial.transform._rotation_spline._create_block_3_diagonal_matrix