[SciPy-User] The different results given by scipy and https://quaternions.online/ when converting Euler angles to Quaternion representation.

[Hongyi Zhao]

Hi,

I try to convert between Euler angle and Quaternion representations.
But I obtained different results when using scipy and the online
converter (https://quaternions.online/). See following for detailed
info:

The results obtained from scipy:

In [14]: from scipy.spatial.transform import Rotation as R

In [15]: r = R.from_euler('xyz', [90, 45, 30], degrees=True)
In [17]: r.as_quat()
Out[17]: array([ 0.56098553,  0.43045933, -0.09229596,  0.70105738])

The results given by the online converter (https://quaternions.online/):

 w: 0.561
 x: 0.701
 y: 0.092
 z: 0.430

Any hints for this problem will be highly appreciated?

Regards,
HY
-- 
Assoc. Prof. Hongyi Zhao <hongyi.zhao at gmail.com>
Theory and Simulation of Materials, Xingtai Polytechnic College
NO. 552 North Gangtie Road, Xingtai, China