[gephi-dev] [Dynamics API] question on "strong" snapshot

[Cezary Bartosiak]

>
> It seems that 1 and 2 have the same definition :p
>

Maybe because I don't understand the difference between any of and every :D
I mean, that in the first case it is enough if at least one interval
overlaps, and in the second case all must overlap. In case of strong
 intervals overlapping is not enough, they must be included. I hope now it
is clear...

On 12 December 2010 11:00, Sébastien Heymann <sebastien.heymann at gephi.org>wrote:

> It seems that 1 and 2 have the same definition :p
>
> I think it's more natural for an API user to have:
> - weak = at least one interval of a node/edge overlapping with the given
> time interval
>
> -strong = every intervals of a node/edge overlapping with the given time
> interval
>
> That could facilitate the use of operators to create
> unions/intersections/exclusions based on time.
>
>
> Seb
>
> 2010/12/9 Cezary Bartosiak <cezary.bartosiak at gmail.com>
>
>> It's funny because there was getWeakSnapshotGraph method that worked like
>> present getStrongSnapshotGraph, which used inclusion in the past. I'm going
>> to restore this situation. So there will be 3 types of snapshots:
>>
>> 1. normal: enough when any of considered node/edge intervals overlap with
>> a given time interval
>>
>> 2. weak: enough when every of considered node/edge intervals overlap with
>> a given time interval
>>
>> 3. normal: enough when every of considered node/edge intervals is included
>> in a given time interval
>>
>> On 9 December 2010 22:12, Sébastien Heymann <sebastien.heymann at gephi.org>wrote:
>>
>>> Arg, that's totally different! Too bad that the inclusion is missing now,
>>> but this could be added in a DynamicUtils class I guess :)
>>>
>>>
>>> Seb
>>>
>>> 2010/12/9 Cezary Bartosiak <cezary.bartosiak at gmail.com>
>>>
>>>> One correction:
>>>>
>>>>
>>>> In other words strong snapshots contain nodes/edges that "exist" only in
>>>>> the given time interval. They don't "appear" before and after that.
>>>>
>>>>
>>>> I don't mean that every time interval must be included in the given
>>>> interval. It is enough to overlap with it. Inclusion would be good for very
>>>> strong snapshots ;)
>>>>
>>>> On 9 December 2010 11:13, Sébastien Heymann <
>>>> sebastien.heymann at gephi.org> wrote:
>>>>
>>>>> Okay it's clear now,
>>>>>
>>>>> Thanks!
>>>>> Seb
>>>>>
>>>>> 2010/12/9 Cezary Bartosiak <cezary.bartosiak at gmail.com>
>>>>>
>>>>> Hi,
>>>>>>
>>>>>> It's simple. In case of a strong snapshot there are more restrictions.
>>>>>> Every node/edge has got its time interval column and probably a few values
>>>>>> in it. The difference between "normal" snapshots and strong ones lies in
>>>>>> checking for overlapping these values (time intervals) with a given time
>>>>>> interval (this one you pass in getStrongSnapshotGraph). In normal snapshots
>>>>>> it is enough if any of these time intervals overlaps with the given time
>>>>>> interval, whereas in strong snapshots every time interval has to overlap
>>>>>> with the given time interval. In other words strong snapshots contain
>>>>>> nodes/edges that "exist" only in the given time interval. They don't
>>>>>> "appear" before and after that.
>>>>>>
>>>>>> On 6 December 2010 14:46, Sébastien Heymann <
>>>>>> sebastien.heymann at gephi.org> wrote:
>>>>>>
>>>>>>> Hi @all,
>>>>>>>
>>>>>>> Can someone explain me the concept of "strong" snapshop in the
>>>>>>> Dynamics API?
>>>>>>>
>>>>>>> I don't understand even with the Javadoc... Is it when a node/edge
>>>>>>> appears only inside the given time interval and never elsewhere, then is it
>>>>>>> part of the snapshot?
>>>>>>>
>>>>>>> cheers,
>>>>>>> Seb
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> gephi-dev mailing list
>>>>>>> gephi-dev at lists.gephi.org
>>>>>>> http://gephi.org/mailman/listinfo/gephi-dev
>>>>>>>
>>>>>>>
>>>>>>
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>>>>>>
>>>>>
>>>>
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>>>
>>
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>
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