diff options
Diffstat (limited to 'numpy/polynomial/hermite.py')
| -rw-r--r-- | numpy/polynomial/hermite.py | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/numpy/polynomial/hermite.py b/numpy/polynomial/hermite.py index 1fd49d774..02b7fb53d 100644 --- a/numpy/polynomial/hermite.py +++ b/numpy/polynomial/hermite.py @@ -1577,13 +1577,13 @@ def hermcompanion(c): n = len(c) - 1 mat = np.zeros((n, n), dtype=c.dtype) - scl = np.hstack((1., np.sqrt(2.*np.arange(1, n)))) - scl = np.multiply.accumulate(scl) + scl = np.hstack((1., 1./np.sqrt(2.*np.arange(n - 1, 0, -1)))) + scl = np.multiply.accumulate(scl)[::-1] top = mat.reshape(-1)[1::n+1] bot = mat.reshape(-1)[n::n+1] top[...] = np.sqrt(.5*np.arange(1, n)) bot[...] = top - mat[:, -1] -= (c[:-1]/c[-1])*(scl/scl[-1])*.5 + mat[:, -1] -= scl*c[:-1]/(2.0 *c[-1]) return mat |