elementary_rotation_matrix

pygaia.astrometry.vectorastrometry.elementary_rotation_matrix(axis, rotationAngle)

Construct an elementary rotation matrix describing a rotation around the x, y, or z-axis.

Parameters:

• axis (str) – Axis around which to rotate (“x”, “X”, “y”, “Y”, “z”, or “Z”)

• rotationAngle (float) – The rotation angle in radians

Returns:

rmat – The rotation matrix

Return type:

array

Raises:

ValueError – If an unsupported rotation axis string is supplied.

Examples

>>> rotmat = elementaryRotationMatrix("y", np.pi/6.0)