Ukufunyanwa kweeNdlela zokudityaniswa
Kwihlabathi eliguquguqukayo lenzululwazi yedatha, iindlela zokuhlanganisana zizimise njengezixhobo eziyimfuneko kwiingcali ezifuna ukukhulisa ukuchaneka kweemodeli zokuqikelela. Siza kuphonononga iziseko zezi ndlela ezivumela uhlalutyo olunzulu kunye noluncinci lwedatha.
Iindlela zokudibanisa, ezinje nge-Bagging okanye i-Boosting, zibonelela ngendlela yokusebenzisana apho iimodeli zokufunda zoomatshini ezininzi zisebenza kunye ukunika uqikelelo oluchanekileyo ngakumbi kunelo lifunyenwe yimodeli enye. Le synergy ayiphuculi nje ukuchaneka, kodwa inciphisa umngcipheko wokugqithisa, i-pitfall eqhelekileyo kwintsimi yedatha yedatha.
Njengoko uzintyintya kolu qeqesho, uya kukhokelwa kwiikhonsepthi eziphambili emva kwezi ndlela, ulungiselela ukuba uzidibanise ngobuchule kwiiprojekthi zakho zesayensi yedatha. Nokuba ungumntu osaqalayo ujonge ukuseka isiseko esiluqilima okanye ingcali enamava ejonge ukucokisa izakhono zakho, olu qeqesho lunikezela ngentshayelelo epheleleyo kunye nenzulu kwihlabathi leendlela zokuhlanganisa.
Ukusebenza kweBagging kunye neBoosting
I-Bagging kunye ne-Boosting ziindlela ezimbini ezidityanisiweyo eziye zaguqula indlela iingcali ezijonga ngayo ukulinganisa kwangaphambili. I-Bagging, okanye i-Bootstrap Aggregating, ibandakanya ukudibanisa iziphumo zeemodeli ezininzi ukufumana uqikelelo oluzinzile kunye nolomeleleyo. Obu buchule busebenza ngokukodwa ekunciphiseni ukungafani kunye nokuphepha ukugqithisa.
Kwelinye icala, i-Boosting igxile ekulungiseni iimpazamo ezenziwe ziimodeli zangaphambili. Ngokwabela ubunzima obuphezulu kuqwalaselo olungahlelwanga kakuhle, i-Boosting iphucula ngokuthe ngcembe ukusebenza kwemodeli. Le ndlela inamandla ekwandiseni ukuchaneka kunye nokunciphisa i-bias.
Ukuphonononga obu buchule bubonisa amandla abo okuguqula indlela idatha ecazululwa ngayo kwaye itolikwe. Ngokudibanisa i-Bagging kunye ne-Boosting kuhlalutyo lwakho, uya kuba nakho ukwenza izigqibo ezichanekileyo kunye nokwandisa iimodeli zakho zokuqikelela.
Imithi Random, into entsha enkulu
Imithi engaqhelekanga, okanye amahlathi angaqhelekanga, amele ukuqhubela phambili okubonakalayo kwinkalo yeendlela zokuhlanganisa. Badibanisa imithi emininzi yesigqibo ukwenza imodeli esebenzayo kunye neyomelele. Umthi ngamnye wakhiwe usebenzisa i-subset engabonakaliyo yedatha, enceda ukwazisa ukuhlukahluka kwimodeli.
Enye yeenzuzo eziphambili zemithi engahleliweyo kukukwazi kwabo ukuphatha inani elikhulu leenguqu ngaphandle kokufuna ukhetho lwangaphambili. Ukongeza, banikezela ukuchasana okugqwesileyo kwidatha enengxolo okanye engaphelelanga.
Enye inzuzo enkulu kukubaluleka kwezinto eziguquguqukayo. Imithi engaqhelekanga ivavanya impembelelo yenguqu nganye kwingqikelelo, ivumela ukuchongwa kwezinto eziphambili eziphembelela imodeli. Olu phawu lubalulekile ekuqondeni unxulumano olusisiseko kwidatha.
Ngamafutshane, imithi engacwangciswanga sisixhobo esibalulekileyo kuyo nayiphi na ingcali enqwenela ukuxhaphaza ngokupheleleyo amandla eendlela zokuhlanganisa. Banikezela indibaniselwano ekhethekileyo yokuchaneka, ukomelela kunye nokutolika.
