Hi,
From the diffusion_tensor.init() documentation for the spheroid:
"The spherical angles {theta, phi} orienting the unique axis of the diffusion tensor within the PDB frame are defined between" Similarly for the ellipsoid: "The angles alpha, beta, and gamma are the Euler angles describing the diffusion tensor within the PDB frame." I have to admit that the convention can be confusing and that the documentation may not be correct. I have been caught looking at the world from the wrong frame before. To be sure, the raw code using these angles and the detailed associated function docstrings can be found in the file maths_fns/direction_cosine.py. Additionally code for the folding of angles to collapse the symmetries can be found in the file generic_fns/diffusion_tensor.py, specifically the function fold_angles(). The problem here wouldn't happen to be inputting the values from Tensor into relax would it? Regards, Edward On Dec 12, 2007 1:03 AM, Douglas Kojetin <douglas.kojetin@xxxxxxxxx> wrote:
Hi All, Quick question. I would just like to confirm if the Euler angles alpha, beta, gamma or the theta and phi angles in the case of a spheroid diffusion tensor are for the transformation of a vector from the diffusion axes reference frame to the PDB reference frame (as opposed to the other way around). Thanks, Doug _______________________________________________ relax (http://nmr-relax.com) This is the relax-users mailing list relax-users@xxxxxxx To unsubscribe from this list, get a password reminder, or change your subscription options, visit the list information page at https://mail.gna.org/listinfo/relax-users