Hi Marvin,

Thank you for your suggestion.

Best regards
Saeed

On Mon, Dec 19, 2022 at 2:42 PM Marvin Bernhardt <[email protected]>
wrote:

> Hello Saeed
>
> Yes, you can also optimize bond and angle potentials such that the
> distributions match the atomistic simulation. In my experience, optimizing
> everything at the same time is not ideal, as it can prevent convergence.
> Optimizing bonded and non-bonded interactions alternately will more likely
> work. See this tutorial
> <https://github.com/votca/votca/tree/master/csg-tutorials/hexane/ibi_all>
> and the `do_potential` option.
>
> Cheers,
> Marvin
> On Monday, 19 December 2022 at 14:27:19 UTC+1 [email protected] wrote:
>
>> Dear Christoph,
>>
>> I appreciate your help.
>> My AA RDF was not correct now it works and the CG RDF matches with AA. I
>> have another question, the RDF for non-boned is matched and I did a
>> pressure correction also to have the correct pressure and density. But the
>> distribution bond, angle, and dihedral do not match with the target
>> all-atom model. should I do the ibi for bonded interactions also? if so,
>> should I first do the iteration for bonded interaction and then for
>> nonbonded or vice versa? or at the same time?
>>
>> Best regards
>> Saeed
>>
>>
>>
>> On Fri, Nov 18, 2022 at 8:36 PM Christoph Junghans <[email protected]>
>> wrote:
>>
>>> On Fri, Nov 18, 2022 at 11:55 AM Saeed Norouzi <[email protected]>
>>> wrote:
>>> >
>>> > Dear Christoph,
>>> >
>>> > Thank you for your reply, I tried those but did not work, and still,
>>> the RDF increases during ibi iteration.
>>> Maybe I am misunderstanding, but your target RDF doesn't go to 1.0,
>>> which has nothing to do with IBI or VOTCA.
>>>
>>> Christoph
>>>
>>> >
>>> > Best regards
>>> > Saeed
>>> >
>>> > On Fri, Nov 18, 2022 at 5:02 PM Christoph Junghans <[email protected]>
>>> wrote:
>>> >>
>>> >> On Fri, Nov 18, 2022 at 7:19 AM Saeed Norouzi <[email protected]>
>>> wrote:
>>> >> >
>>> >> > Dear developers,
>>> >> >
>>> >> > I am trying to run IBI using csg_inverse --options settings.xml,
>>> and all necessary information is attached below. my RDF does not go to 1
>>> during ibi iteration. Can you please help me with what is wrong?
>>> >> Looks to me like you need to increase the box size and just sample the
>>> >> RDF to a higher radius. (in the target setup)
>>> >> Also a step of 0.005 seems a bit too fine, try 0.01 as a start, only
>>> >> make it finer if you can resolve a peak.
>>> >>
>>> >> Christoph
>>> >>
>>> >> >
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>>> >>
>>> >>
>>> >> --
>>> >> Christoph Junghans
>>> >> Web: http://www.compphys.de
>>> >>
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>>> Web: http://www.compphys.de
>>>
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