[Chimera-users] Deleting data contained in a session

[Eric Pettersen]

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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