Ok i think I found an example that is independent of my data (adapted from
http://docs.neo4j.org/chunked/snapshot/gremlin-plugin.html)
Locally:
gremlin> m = [:];g.v(33).bothE().label.groupCount(m) >> -1;m
==>follows=11
==>owns=48
gremlin> m = [:];g.v(33).bothE().label.groupCount(m) { it }{ it += 0.1 } >>
-1;m
==>follows=1.1
==>owns=4.8
REST/webadmin console:
gremlin> m = [:];g.v(33).bothE().label.groupCount(m) { it }{ it += 0.1 } >>
-1;m
==> follows=11
==> owns=48
gremlin> m = [:];g.v(33).bothE().label.groupCount(m) { it }{ it += 10 } >>
-1;m
==> follows=11
==> owns=48
gremlin>
It seems like the closure block is not evaluated (to me as a
Groovy/Gremlin/Neo4j noob)
Michael, I will send you a link to my database in private.
Thanks,
Jeroen
On Mon, Nov 7, 2011 at 12:41 PM, Michael Hunger <
michael.hun...@neotechnology.com> wrote:
> Jeroen,
>
> that would indeed help a lot.
> I'll find it.
>
> Michael
>
> Am 07.11.2011 um 12:34 schrieb Jeroen van Dijk:
>
> > Hi Michael,
> >
> > I would like to provide a better example, but my Groovy is quite poor so
> it
> > I'll take me some time. However I think the problem isn't in the JSON
> > conversion. Because that would mean the results I get would be the same,
> > but with a different score right? The thing is that I get different
> > Vertices back through the REST interface than I do locally. To me that
> > means things already fail during the Gremlin evaluation.
> >
> > I will try to come up with a more isolated example. If it helps I could
> > give you access to my dataset on Heroku (or through a Zip file).
> >
> > thanks,
> > Jeroen
> >
> > On Mon, Nov 7, 2011 at 11:34 AM, Michael Hunger <
> > michael.hun...@neotechnology.com> wrote:
> >
> >> Jeroen,
> >>
> >> can you narrow it down to a simpler operation, like just a division?
> >>
> >> Perhaps in the conversion from the division result (be it Float, Double,
> >> BigDecimal) to
> >> JSON something goes awry.
> >>
> >> In the GremlinPlugin the code for that is:
> >>
> >> } else if (result instanceof Double || result instanceof Float) {
> >> return ValueRepresentation.number(((Number)
> >> result).doubleValue());
> >> }
> >>
> >> I'm not sure what datatype groovy creates as result of your operation,
> >> perhaps you can determine that as well.
> >>
> >> If we have a simple gremlin / groovy calculation that yields the wrong
> >> results, we can easily inspect and fix the plugin.
> >>
> >> Thanks a lot
> >>
> >> Michael
> >>
> >> Am 07.11.2011 um 11:12 schrieb Jeroen van Dijk:
> >>
> >>> Hi all,
> >>>
> >>> I'm using Gremlin to perform a recommendation query. Locally in the
> >> gremlin
> >>> shell I get amazingly useful results. However when I use the webadmin
> >>> gremlin console I get different results, both locally and in the Heroku
> >>> addon environment. I get the same wrong results when I use the rest
> >>> interface, so I assume something is incorrect in the Gremlin REST
> >>> interface. In all these cases the data is the same or on the same
> >> database.
> >>>
> >>> The gremlin query is below (it is own of my first so probably not the
> >> most
> >>> efficient). It returns the top 10 list of most similar items according
> to
> >>> the Jaccard similarity index (= (Intersection(A, B) / Union(A, B) ):
> >>>
> >>> node = g.v(14260); m = [:].withDefault{0.0}; a_total =
> >> node.inE().count();
> >>> node.in().out('owns').sideEffect{union = a_total +
> >>> it.inE().count()}.groupCount(m) { it }{ it += (1/(union)) } >> -1;
> >>> m.sort{a,b -> b.value <=> a.value}[0..9]
> >>>
> >>> When I do the following locally everything is fine:
> >>>
> >>> gremlin> g = new
> >>>
> Neo4jGraph('/usr/local/Cellar/neo4j/community-1.4/libexec/data/graph.db')
> >>> ==>neo4jgraph[EmbeddedGraphDatabase
> >>> [/usr/local/Cellar/neo4j/community-1.4/libexec/data/graph.db]]
> >>> gremlin> node = g.v(14260); m = [:].withDefault{0.0}; a_total =
> >>> node.inE().count(); node.in().out('owns').sideEffect{union = a_total +
> >>> it.inE().count()}.groupCount(m) { it }{ it += (1/(union)) } >> -1;
> >>> m.sort{a,b -> b.value <=> a.value}[0..9]
> >>> ==>v[14260]=0.5000000013
> >>> ==>v[12974]=0.1014492752
> >>> ==>v[12349]=0.0952380952
> >>> ==>v[12082]=0.0833333332
> >>> ==>v[15434]=0.0810810810
> >>> ==>v[11237]=0.0810810810
> >>> ==>v[17672]=0.0769230768
> >>> ==>v[18338]=0.0769230768
> >>> ==>v[12852]=0.0769230768
> >>> ==>v[11969]=0.075
> >>> gremlin>
> >>>
> >>> However when I repeat this using the webadmin console interface I get
> the
> >>> following results:
> >>>
> >>> gremlin> node = g.v(14260); m = [:].withDefault{0.0}; a_total =
> >>> node.inE().count(); node.in().out('owns').sideEffect{union = a_total +
> >>> it.inE().count()}.groupCount(m) { it }{ it += (1/(union)) } >> -1;
> >>> m.sort{a,b -> b.value <=> a.value}[0..9]
> >>> ==> v[14260]=31.0
> >>> ==> v[9204]=30.0
> >>> ==> v[8958]=29.0
> >>> ==> v[15763]=22.0
> >>> ==> v[13906]=22.0
> >>> ==> v[18477]=21.0
> >>> ==> v[9081]=20.0
> >>> ==> v[9019]=19.0
> >>> ==> v[9074]=18.0
> >>> ==> v[9066]=18.0
> >>>
> >>> The values of a Jaccard Index should never be above 1 so something is
> >>> clearly wrong. Any ideas?
> >>>
> >>> Thanks,
> >>> Jeroen
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