cupyx.scipy.linalg.companion¶
-
cupyx.scipy.linalg.
companion
(a)[source]¶ Create a companion matrix.
Create the companion matrix associated with the polynomial whose coefficients are given in
a
.- Parameters
a (cupy.ndarray) – 1-D array of polynomial coefficients. The length of
a
must be at least two, anda[0]
must not be zero.- Returns
- The first row of the output is
-a[1:]/a[0]
, and the first sub-diagonal is all ones. The data-type of the array is the same as the data-type of
-a[1:]/a[0]
.
- The first row of the output is
- Return type
See also