graph mining: project presentation - hasso plattner …...graph mining ws 2017 project rules 7 the...
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Graph Mining: Project presentation
Graph Mining course Winter Semester 2017
DavideMottin,AntonTsitsulinHassoPlattnerInstitute
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GRAPH MINING WS 2017
Lecture road
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Projectdescription
Datasets
Toolsandlibraries
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GRAPH MINING WS 2017
Lecture road
3
Projectdescription
Datasets
Toolsandlibraries
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GRAPH MINING WS 2017
What is the project about?
▪TheprojectisananalysisofaSIGNIFICANTLYlargenetwork(>10knodes/edges)▪Chooseonedataset,convertintoagraphandperformananalysis(predictions,statistics,communities,…)tohighlightcertainaspectsofthedata▪Choosetheanalysesyouwanttoperformandhighlightandthemethodsyouwanttouse(e.g.,correlationswithdegrees,labelpropagation,…)▪Wewillprovidesomelinkstodatasetsandavailablealgorithms,butyouarewelcometochooseothersaswell▪Youshouldevaluatetheperformanceoftheapproachanditsresults,reportyourfindings,showwhytheanalysisisusefulandproposeideas/directionstoimproveit
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GRAPH MINING WS 2017
Algorithms: five options
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1. Requestthecodefromtheauthorsofapaperyoulikeorimplementthetechniquebyyourself(becareful,itrequiresalotoftime!)
2. ImplementaSIMPLEalgorithmforaspecifictaskbyyourself3. Useoneofthetoolswepresent(orsimilartoolforgraph
analysis)4. Comparetwoormoreexistingtechniquesinatleastone
dimension(efficiency,effectiveness,scalability,accuracy,specificlimitations/characteristics,maximumdatasizetheycanhandle,...)
5. LookupGitHubsearch;)
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GRAPH MINING WS 2017
Project’s general goal
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▪ Themainideaistohavetheinsightsofthenetworkwithaspecifictechnique,retrieveinterestingfacts,andcriticallyanalyzethealgorithm’sperformanceandresults▪ Startbysomehypothesisonthedata,forinstance:• peopleinBerlintendtolikeelectronicmusic• fantasymoviesareratedhigheramongyoungpeople
• Chessplayerswiththesamescorewillplaytogethermoreoften
▪ Theprojectshouldbefunandgiveyouanideaofthepropertiesofthenetworkandthealgorithm(s)ofchoice!▪ Youcanchangethealgorithmtofitspecificpurposes▪ Theanalysisshouldnotbetrivialbutalsonottoosophisticated
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GRAPH MINING WS 2017
Project rules
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▪ Theprojectcanbedoneingroupsof2or3people▪ Allprojectsmustbedifferent▪ Thehandoutisareportofmax3-5pageswithasetofstatisticsandinsights
▪ Presentationoftheresultsmustbeunderstandableandconclusive(visualexamples,differentusecases)• YouMUSTvisualizesomeimportantpartsofthegraph:for
nodeclassificationyoucanshowdifferentclassifiednodes,forgraphqueryinghowthealgorithmbehaveswithparticularpatterns(stars,triangles,cores...),..
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GRAPH MINING WS 2017
Report rules
▪UsethefollowingLaTextemplate:tiny.cc/GMREP▪ThereportmustbehandedoveronFeb16th,noextensionisallowed▪ThereportshouldbesentviaemailinasinglePDFfileintheformat:[Last-name-1]-[Last-name-2]-report.pdf
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GRAPH MINING WS 2017
Report content (more details in the tex file)
1. Maincharacteristicsofthedataset(s)2. Datapreprocessingstepsandstoringchoices3. Descriptionofthemethodologyandthekindofanalysis4. Presentationoftheresults1. Showusefulnessandnoveltyoftheresults2. Comparetheruntimeandthescalabilityoftheusedmethod
5. Commentonthelimitationsoftheusedmethod
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GRAPH MINING WS 2017
Important dates
▪22/11:Groupsandpreliminaryideasondata▪20/12:Informalfeedbackontheprojects(noevaluation)▪31/01-07/02:Projectin-classpresentation▪16/02:Reporthandover(viaemail)
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GRAPH MINING WS 2017
Community Detection: Analysis of Political communities in Reddit
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▪Data•Redditisasocialnewswebsite•Discussionsareorganizedingroups(subreddits)•234Millionusers,>100ksubreddits• Theprojectanalyses2014politicssubreddit
▪Preprocessing•Nodesareusers,edgesareinteractionsamongthem•Keeponlyconnectedcomponents• Twodifferentsubsets
▪Algorithms•ModularityoptimizationwithGirvan-Newmann• Spectralclustering
▪Networkanalysis•Peoplewithsimilarpoliticalthoughtsclustertogether
Preprocess the data in a smart way
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GRAPH MINING WS 2017
Node Classification: League of Legends
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▪Data• LeagueofLegendsisaMultiplayerOnlineBattleArena(MOBA)• 100Millionplayers/month• 5playerscompeteeachotherineverybattle• Theprojectpredictsuserskillsandclassificationofchampionroles
▪ Preprocessing• Nodesareplayers,edgesarebattlesorheroselections• 180.000matches,6patches• Everypatchchangesthedynamicsofthegame
▪Algorithms• Spectralclusteringonnormalizedadjacency• Clusteringcoefficientalgorithm+severalvariants
▪Networkanalysis• Hypothesis:Clusterrepresentrolesinthegame,sinceeveryheroisusuallyassignedtothesamerole.
Try small variations of algorithms (e.g. weighted)!
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GRAPH MINING WS 2017
Other good example projects
▪ TemporalAnalysisofResilienceintheUSAirlineNetwork
▪ StructureandEvolutionofBitcoinTransactionNetwork
▪ PlayerRankingsandOutcomePredictioninTournaments
▪ LeagueofLegends:TheMetaasaFunctionofTimeandRank
▪ PredictingRevertsinWikiGraphProperties
▪ TheInterplayofMoneyandPoliticsintheUnitedStatesHouseofRepresentatives
▪ VideoGameCommunityAnalysis-DestinyClanWars
▪ IdentifyingEfficientLearningPaths
▪ PredictingNewRatingsandCreatingBusinessRecommendationsonYelp
▪ TheTimetheyarea-Changin':EvolvingCommunitiesinaMusicianNetwork
▪ DetectingandAnalyzingPoliticalCommunitiesinPolticsSub-RedditComments
▪ LinkPredictionforPinterestBoardRecommendation
▪ CommunityDetectionandNetworkAnalysisonRandomActsofPizza
▪ UnderstandingDistanceEffectsinGlobalFoodTradeThroughNetworkAnalysis
▪ PredictingStockMovementsUsingMarketCorrelationNetworks
▪ ArrestCharges’(Non)-IndependenceinBlackandWhiteMen
▪ HotorNot?FindingStarProjectsinCodingSocialNetwork
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GRAPH MINING WS 2017
Lecture road
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Projectdescription
Datasets
Toolsandlibraries
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GRAPH MINING WS 2017
Datasets
▪Commonsources:•Wikipedia,Wikidata,…•Academictorrents• /r/datasets• govdata.de,daten.berlin.de–GermanyOpenDataLaw•ArchiveTeam• SNAP
▪Wecanprovidesomedatasets/samples▪Preprocessingshouldnoteatupallyourprojecttime
• Seekforpartiallypreprocesseddata
▪Don’tbeafraidtosubsample!
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GRAPH MINING WS 2017
Wikipedia
▪Motherofmanygraphminingprojects•Manytypesoflinks,richdata•Completehistoryisavailable
▪Wikidataoffersfreepreprocessing•Automaticallyextractslinksfromwikiindifferentlanguages
▪Don’tforgetotherprojects:•Wikiquote
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GRAPH MINING WS 2017
Wikipedia: example projects
▪Hiddeninfluencersinhumanhistory•Person-to-persongraphfromwikidata•Compareinfluencersfromgraphperspectivetoarticlelengths
▪TwinTowns(Sistercities)•BerlinisasistercityofMoscow,London,andWindhoek(Namibia)• Isthereanystructureinhowtheyarecreated?Communities?
▪Warnetworkbetweencountries• FranceandEnglandarearch-nemesis• Italyandliterallyanycountryaround•Canwedetectmore?
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GRAPH MINING WS 2017
Chess networks
▪ lichess.org▪FIDEratedgames
▪Examplequestions:•Areplayersofsimilarratingsgroupedtogether?•Doplayerslearnopeningsfromeachother?•Howconnectedarethelow-ratedplayers?•Dochessopeningsform“playertypes”?
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GRAPH MINING WS 2017
DoTA networks
▪YetanotherMOBAgame▪1.1billionmatchesavailable
▪Exampleanalyses:•Howdonewheroesaffectthegame•Howtheherocentralitychangesovertime•…youareprobablybetterexperts
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GRAPH MINING WS 2017
Lecture road
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Projectdescription
Datasetsfortheproject
Toolsandlibraries
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GRAPH MINING WS 2017
Graph data repositories
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▪ https://snap.stanford.edu/data/▪ http://konect.uni-koblenz.de/▪ http://irl.cs.ucla.edu/topology/#data▪ http://networkrepository.com/▪ https://networkdata.ics.uci.edu/index.php▪ http://nexus.igraph.org/api/dataset_info▪ http://www.geonames.org/export/▪ https://github.com/caesar0301/awesome-public-datasets▪ http://www.icwsm.org/2016/datasets/datasets/▪ https://datahub.io/dataset?tags=ontology&_tags_limit=0
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GRAPH MINING WS 2017
Graph indexing and graph querying
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● Graphcreation,graphgeneration,computingstructuralproperties,visualization○ iGraph(R,Python,C)○ Snappy(Python)○ Jung(Java)○ NetworkX(Python)
● GRAIL:reachabilityqueries● RQ-tree:Reliabilitysearchinuncertaingraphs
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GRAPH MINING WS 2017
More features of the above-mentioned libraries
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● iGraphR/Python/C,NetworkX:attribute-basedquerying● iGraphC:computingspanningtrees,clusteringcoefficient,
examininggraphisomorphism● Snappy:findingcommunities,computingnodecentrality● Jung:computingmaximumflow● NetworkX:longlistofalgorithms!
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GRAPH MINING WS 2017
Frequent subgraph mining
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• Gradoop(Java,Hadoop)• distributedgraphanalyticsincludingafrequentsubgraph
miningapproach• XifengYansoftwarepackages
• gSpan,frequentsubgraphminingalgorithm(Java/C++)• Gupta2014,approachforinterestingsubgraph
discoveryinsocialnetworks(Java)• MUSK:MarkovChainMonteCarlomethodtoguarantee
maximallyfrequentsubgraphstobesampled
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GRAPH MINING WS 2017
Social network analysis
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• Analysis• Snappy(Python):communitydetection,connected
componentcomputation,k-corecomputation,etc.• Analysisandvisualization
• Windowssoftwarepackages• Ucinet(text-book)• Pajek
• Othertools• Gephivisualizationtool:computationofsimplemetrics,
visualizingtimestamps,findingclusters• NodeXL:Microsoftexceltool
• MoretoolsforSNA
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GRAPH MINING WS 2017
Multi-purpose libraries
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● Pegasus(Java,Hadoop)○ parallelcomputationofnodedegree,PageRankscore,
connectedcomponents,randomwalkswithrestart● Gradoop(Java,Hadoop)
○ distributedgraphanalytics● Giraph(Java,Hadoop)
○ large-scalegraphprocessing
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GRAPH MINING WS 2017
Multi-purpose libraries (2)
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● NetworkX(Python)○ Algorithms:cliques,homophily,communities,clusters,link
prediction,etc.● GraphX(Spark,Scala)
○ parallelcomputationoftriangles,connectedcomponents,PageRankscore
● GraphDatabases○ neo4j(Cypher,Java):tutorialandfeatures○ sparksee(.Net,C++,Python,Objective-C,Java)
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GRAPH MINING WS 2017
Multi-purpose libraries (3)
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● Graph-tool(Python)○ graphstatistics,centralitymeasures,topological
algorithms,networkinference● jGraphT(Java)
○ graphtheoryalgorithms○ visualization
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GRAPH MINING WS 2017
Diffusion models
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● Netinf(SNAP)○ informationcascadetracking
● NDVT(R)○ R-basedtoolthatrendersdynamicnetworkdatafrom
'networkDynamic'objectsasmovies,interactiveanimations,orotherrepresentationsofchangingrelationalstructuresandattributes(documentation)
● EpiModel(R)○ R-basedtoolforsimulatingandanalyzingmathematical
modelsofinfectiousdisease(documentation)
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GRAPH MINING WS 2017
Node classification and similarity
▪ FaBP• DanaiKoutra,PKDD2011:FastBeliefPropagationfornode
classificationingraphs
▪ LinBPandSSLH• Linearizedandimprovedsinglepassbeliefpropagationand
semi-supervisedwithhomophily
▪ Anyclassifier(suchasLinearRegressioninNumpy)
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Link prediction
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• NetworkX(Python)• algorithmlistincludingalinkpredictionapproach
• Githubprojects• LPmade(Java)
• manual• LinkPred(Python)
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Graph summarization
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● Vog(Python)○ DanaiKoutra,StatisticalAnalysisandDatamining2015:
SummarizingandUnderstandingLargeGraphs
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GRAPH MINING WS 2017
Graph Embeddings
▪Deepwalk:https://github.com/xgfs/deepwalk-c▪Node2vec:https://github.com/aditya-grover/node2vec▪NEU:https://github.com/thunlp/NEU▪LINE:https://github.com/tangjianpku/LINE▪HOPE:https://github.com/AnryYang/HOPE
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GRAPH MINING WS 2017
Data and algorithm selection
● Youarewelcometochoosethedatasetandalgorithm/toolyouprefer,evenoutsidethelist!
● Letusknowaboutyourdecisionbeforeyoubeginworkingonyouranalysis,sothatwecangiveyoufeedbackandhelpifnecessary:)
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Time for discussion
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