[Chimera-users] Questions about the electric fieldline

[Elaine Meng]

Hi Qiao Xue,
Your command looks OK to me, but are you sure that the dx file is model #0?   Check in the Model Panel (open from Favorites menu) that it is really model #0.  If you have other things open at the same time, like the atomic structure, it could be #1, #2, etc. instead and you should change the model number in the command. Other than that, my only other idea is that the dx file is empty or the wrong format.
I hope this helps,
Elaine
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Elaine C. Meng, Ph.D.                       
UCSF Chimera(X) team
Department of Pharmaceutical Chemistry
University of California, San Francisco

> On Dec 5, 2018, at 11:52 PM, xmgign at 126.com wrote:
> 
> Hi
> I want to make the electric fieldline but there are always some problems.
> I did this as follows,
> 1. run add charge to the system
> 2. run APBS, the I get the electrostatic surface and a file named 1.dx
> 3. open 1.dx
> 4.measure fieldLines #0 lines 500 startAbove 10 color pink linewidth 2
> then I get the problem : no volume specified
> 
> I have check the userguide of measure fieldlines, but there is nothing about the volume. 
> measure fieldLines  map-model(s)  [ lines N ] [ startAbove cutoff ] [ step s ] [ modelId model-number ] [ color line-color ] [ lineWidth width ] [ tubeRadius radius ] [ circleSubdivisions M ] [ markers true|false ]
> 
> what should I do next?
> Thanks.
> Qiao Xue