Hi,
I found that the "v1+v2" and "v1v2avg" will have value 0 for the second
atom. For example, the average will like this:
#Frame
v1v2avg
1 -4.0020 -6.8703 -1.6296 0.0000 0.0000 0.0000
2 -4.0554 -6.3181 0.0754 0.0000 0.0000 0.0000
3 -3.6711 -6.7002 -1.0018 0.0000 0.0000 0.0000
4 -3.3958 -6.7124 -1.7281 0.0000 0.0000 0.0000
5 -3.7376 -6.6023 -0.6738 0.0000 0.0000 0.0000
6 -3.4273 -6.4535 0.3972 0.0000 0.0000 0.0000
What's causing this?
Thank you!
Best,
Jing
On Wed, Nov 27, 2024 at 12:28 PM Jing Qu <jqu2.ncsu.edu> wrote:
> Hi,
>
> Thanks for help! Yes I want this plane in order to project another two
> vectors (or an angle, these two vectors will form an angle) onto it.
>
> The plane is perpendicular to that average vector, or as David said, the
> plane is perpendicular to the average vector and contain the origin of
> the vector. So could I define this plane via cpptraj? And then I need to
> project another two vectors onto this plane.
>
> Best,
> Jing
>
>
> David A Case <dacase1.gmail.com>于2024年11月27日 周三10:56写道：
>
>> On Wed, Nov 27, 2024, Daniel Roe via AMBER wrote:
>>
>> >Maybe I'm not understanding what you mean, but getting a plane
>> >perpendicular to a vector doesn't make sense. You need at least 3
>> >points to define a plane.
>>
>> Just to butt in here: I think Jing wants the plane in order to project
>> another vector onto it. In that case, the phrase "plane perpendicular to
>> a
>> vector" could be replaced with "plane perpendicular to a vector and
>> containing the origin of the vector."
>>
>> The math involved in getting the projection is clearly described in many
>> places. Try a web search on "projecting a vector onto a plane".
>>
>> ....good luck...dac
>>
>>
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Received on Mon Jan 06 2025 - 20:00:02 PST
