[gmx-users] Length of .xtc file in frames for C-Code

[Tsjerk Wassenaar]

Hi GtrAngus,

That's not possible, because the size of a frame is not fixed in XTC
format. You can get an estimate by dividing the size of the file by the
size of the first frame. That may not be accurate, though.

Cheers,

Tsjerk
On Apr 3, 2014 6:31 PM, "GtrAngus" <maps99 at online.de> wrote:

> Hi :)
>
> I have a question to all the people who are familiar with C-code. How can I
> read in the total number of frames in my *.xtc file? Especially when I do
> the analysis somewhere in the middle?
>
> E.g: I have a file with 100.000 frames. When I start the programm with
>
> ./program -f traj.xtc
>
> then I want somewhere in my code something like:
>
> int totalnumerbofframesyouareanalyzing = 100.000
>
>
> When I do the same with:
>
> ./program -f traj.xtc -b 20.000
>
> then I want in my code:
>
> int totalnumerbofframesyouareanalyzing = 80.000
>
> Thanks for your help!
> GtrAngus
>
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