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1、DataanditsvisualizationProfessorMikkoKolehmainenUniversityofEasternFinlandDepartmentofEnvironmentalScienceResearchUnitofEnvironmentalInformaticsWhatkindofdataisavailable-exampleMeteorologicaldataisoneoftheoldestsourcesofthiskindUrbanairqualitymeasurementshavebeenca
2、rriedoutroutinelyinmostofthecitiesThesetwocreateanexcellentopportunitytomonitortheworkingsofthenatureandhumanactivitiesmixedincomplexwaysThedatasetsarenowreachingmanyyearsbackintimeitispossibletousecomputationalmodelsforthesetime-series.15.7.2021MikkoKolehmainenWha
3、tkindofdataisneededformodelingenvironmentalprocesses?Timerange:AtleastoneyearbecauseoftheseasonalityThreeyearsisapracticalminimumbecauseofdifferentyearsIfyoucanhave5-10yearsyoushouldbeabletocontructandvalidateusefulmodelsRepresentativeness:Isthephenomenonstationary
4、(i.e.meanandvariancedonotchangeovertime)?TheprocessisdescribedthroughthedataOneofthemostimportantthingstobearinmindinisthatwhatisactuallymodelledis(orshouldbe)theprocessweareinspecting.Thus,thedataavailabledescribethatprocess(phenomenon)onlyinsomelimitedway,so,know
5、ledgeabouttheprocessisimportant.15.7.2021MikkoKolehmainenWhatkindofdatawehaveusedinUEFinresearchandteaching?Ourownrealdata:AirqualitydataEpidemiologicaldataWastecollectiondataArtificialnosedataFoxbehaviourdata”Referencedata”BostondataIrisdataGeneexpressiondataAirqu
6、alitydata35064x10hourlymeasurements'Date''Julianday''Time''NO2''O3''PM10''CO''Temp''Hum''WS'199609062509342113,51,28,5500174,77,431996090625010362231,91,29,6499965,37,731996090625011372131,91,210,75568,021996090625012382231,91,311,15537,91996090625013401931,91,611,
7、65507,7719960906250144618111,612,15477,651996090625015471831,91,412,15477,4819960906250164120141,112,15477,3119960906250174019141,112,15477,131996090625018361914111,55506,5519960906250193220331,210,95535,9719960906250203321331,310,35565,3819960906250212624331,19,85
8、605,5119960906250228447,60,39,35645,6319960906250236457,60,38,95001685,7519960906250244427,60,28,7499974,75,6319960907251152617,20,38,5500181,35,
