Hi all, I have a follow-up question here. I calculated the eigenvalues and the eigenvectors and some of them have imaginary terms. The real terms of the eigenvalues match a 2-fold rotation, but I am just wondering what the imaginary terms represent. It's been quite a while since I studied linear algebra.
Thank you so much, Chen On Mon, Sep 22, 2014 at 10:41 AM, Philip Kiser <[email protected]> wrote: > Cool. Glad to help. > > On Mon, Sep 22, 2014 at 10:34 AM, Chen Zhao <[email protected]> wrote: > >> Dear Philip, >> >> Please forgive me! Yes it is eigenvectors that I am looking for. I was >> deriving myself and came to the conclusion that R=A^(-1)R'A, but I just >> forgot it is eigenvectors, and I forgot what the eigenvector is originally >> for. Thank you so much! >> >> Sincerely, >> Chen >> >> On Mon, Sep 22, 2014 at 10:22 AM, Philip Kiser <[email protected]> wrote: >> >>> Hi Chen, >>> >>> Wouldn't the fold of the NCS be clear from the PDB file? You could use >>> superpose to superimpose one monomer onto the next member of the NCS group, >>> and then take the rotation matrix output from that program to calculate the >>> eigenvectors for the transformation. The NCS axis is parallel to one of >>> those eigenvectors. >>> >>> Philip >>> >>> Philip >>> >>> On Mon, Sep 22, 2014 at 10:13 AM, Chen Zhao <[email protected]> wrote: >>> >>>> Dear all, >>>> >>>> Is there a software that can print out the position and the fold of a >>>> NCS rotational axis from a PDB file? (just something like molrep >>>> self-rotation on a reflection file) I cannot use molrep because the RMSD >>>> between the two copies are too high, and I just want to cut a certain >>>> region for calculation. I don't know whether calculated Fc from the >>>> truncated PDB works in molrep self-RF, but I am thinking whether there is a >>>> more straightforward way. >>>> >>>> Thanks a lot in advance! >>>> >>>> Sincerely, >>>> Chen >>>> >>> >>> >> >
