Orientation of input axes in terms of output axes for affine
Valid for an affine transformation from p dimensions to q dimensions (affine.shape == (q + 1, p + 1)).
The calculated orientations can be used to transform associated arrays to best match the output orientations. If p > q, then some of the output axes should be considered dropped in this orientation.
Parameters: | affine : (q+1, p+1) ndarray-like
tol : {None, float}, optional
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Returns: | orientations : (p, 2) ndarray
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