-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Dear Ashok, you can get the axis as described in https://en.wikipedia.org/wiki/Rotation_matrix#Conversion_from_and_to_axis-an..., i.e. you find the eigenvectors and -values of the matrix (R-I). This can be done with algebra programs like octave or maxima. The angle alpha is given by (also see above link) by tr(R) = 1+2cos(alpha) It's probably 5-10min typing including search the web for the respective syntax. Best, Tim On 07/10/2015 07:22 AM, Ashok Nayak wrote:
Dear Phenixites,
I have a helical bundle structure, where in I wish to understand by what rotation and about which axis the dimers are inter-related. What I get from the superposition with Superpose is the transformation matrix and not the axis, and the angles are also elusive. Thanks in advance
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- -- - -- Dr Tim Gruene Institut fuer anorganische Chemie Tammannstr. 4 D-37077 Goettingen phone: +49 (0)551 39 22149 GPG Key ID = A46BEE1A -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFVn4MxUxlJ7aRr7hoRAmEsAKDvkQ9dn6E6mDWfQLkl+Rs/OHpEVgCgjmuK 4SKMsjjv78PCD2dJc2YPJuM= =nZIa -----END PGP SIGNATURE-----