[Chimera-users] Deleting data contained in a session

David Sáez davidsaez at udec.cl
Mon Apr 29 21:16:16 PDT 2019

Awesome! Works like a charm.

Many thanks.


On Mon, Apr 29, 2019 at 6:26 PM Eric Pettersen <pett at cgl.ucsf.edu> wrote:

> Hi David,
> You’ll have to resort to Python for this.  I’ve attached a (short) Python
> script that does the job.  Simply opening it with the “open” command or
> File→Open will result in the other coordinate sets being pruned away.  Let
> me know if you have any problems.
> —Eric
> Eric Pettersen
> UCSF Computer Graphics Lab
> On Apr 29, 2019, at 7:53 AM, David Sáez <davidsaez at udec.cl> wrote:
> Dear Chimera experts:
> I have saved multiple sessions of molecular dynamics trajectories. Each
> session is about 5MB.
> Nevertheless, one of those files is huge, about 120MB. Checking the
> differences, I noticed that one of the  files contained in the session,
> which normally is a one-frame .pdb, in the large case corresponds to a .nc
> file, a whole trajectory containing a large number of frames. I did not
> notice this before because when I opened the .py file, the MD movie box is
> not shown.
> As I am only interested in the currently displayed frame of this .nc file,
> is there a way to delete the additional frames? Some command line trick
> that would allow me to get rid of the uninteresting frames, and decrease
> the file size, without having to re-make the whole session again?
> My most immediate concern is that the file size is too large to be
> uploaded to a journal online platform.
> Any help is appreciated,
> Regards.
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