Re: [gmx-users] Overlap between PC motions

2013-06-18 Thread Miguel Ángel Mompeán García
Hi Tsjerk, I really appreciate your comments. I proceeded as you recommended, and calculate the subspace overlap in the way you proposed. I first performed the analysis varying the starting points, instead of the end ones. I start from 110 ns down to 0ns, with 10ns time intervals: Normalized DT

Re: [gmx-users] Overlap between PC motions

2013-05-30 Thread Tsjerk Wassenaar
Hi Miguel, The fitting doesn't play a role; it's the dynamics of the system in the internal frame. Because the internal frame moves, you fit, so that any contribution due to the rigid body motion is removed. For the rest you have to look at it like this: You start out somewhere and walk (relax) t

Re: [gmx-users] Overlap between PC motions

2013-05-30 Thread Miguel Ángel Mompeán García
Hi Tsjerk, Thanks for the reply! So, let me see if I am getting the things right. The same fitting structure is used for the overlap calculation. Since the averaged structure is used for the covariance matrices, this is the reason why the relaxation is included. Am I right? The overall behavior of

Re: [gmx-users] Overlap between PC motions

2013-05-30 Thread Tsjerk Wassenaar
Hi Miguel, Sorry for not responding earlier, but the question isn't really simple :) What you do is determining the covariance matrix from the start up to a certain point and see for different end points what the overlap is with the covariance matrix from the whole. This means that in all cases, t

[gmx-users] Overlap between PC motions

2013-05-30 Thread Miguel Ángel Mompeán García
Dear all, I posted some days ago an issue regarding overlap values. If any of you is experienced with this I would appreciate some comments. Please find below the mentioned post: I am doing PCA on a 110ns run. When calculating the subspace overlap from independent PCA performed in different time