Kwemeza
Kwambukiranya imipaka ni tekinike yo gusubiramo uburyo bwo kugereranya uburyo icyitegererezo kizajya kibona amakuru atagaragara.
Incamake
It makes better use of limited data and gives a more reliable performance estimate than a single train/test split.
Kwibira cyane
Gariyamoshi imwe / ikizamini cyo gutandukana biroroshye: amanota ubonye biterwa cyane numurongo wabaye kumurongo wikizamini. Kwambukiranya-gukosora ibi mukuzenguruka uruhare rwibizamini. Muri k-inshuro zinyuranye-zemeza, ugabanya amakuru mubice k bingana, uhugura kuri k-1 yabyo, usuzume kumurongo wafashwe, hanyuma usubiremo k inshuro kuburyo buri murongo ugeragezwa rimwe gusa. Ugereranije amanota k atanga umusaruro ushimishije wongeyeho igipimo cyo guhinduka. Guhitamo bisanzwe ni inshuro 5 cyangwa 10. Ibihinduka birimo ibyiciro k-bikubye (kubika ibipimo byurwego rwimibare idahwitse), gusiga-umwe-hanze (k bingana numubare wintangarugero), hamwe nigihe-cyiciro cyo gutandukana bitigera bitoza ejo hazaza guhanura ibyahise.
Ubushishozi
Kwambukiranya imbaraga birakomeye cyane muburyo bwo gutoranya icyitegererezo no guhuza hyperparameter: ugereranya ibishushanyo ukurikije amanota yabo yo kwemeza aho gukwirakwira. Umutego ukomeye ni ukumenyekanisha amakuru - ikintu icyo ari cyo cyose cyatunganijwe 'kibona' imibare yose (gupima, guhitamo ibiranga, kwishyiriraho ibiciro) igomba kuba ikwiye muri buri bubiko, ntabwo mbere yo gutandukana, cyangwa ikigereranyo cyawe kizaba kibogamye. Nested cross-validation itandukanya guhuza nisuzuma ryanyuma kugirango wirinde kumeneka.
Ingaruka z'Ingamba
Ibyemezo bisobanutse
Iragufasha gutandukanya ibyifuzo bya tekiniki bisobanutse nururimi rwo kwamamaza.
Igiciro na bije
Urashobora kubaza ibibazo byiza byo gushyira mubikorwa mbere yo gukoresha amafaranga cyangwa igihe.
Itsinda hamwe nakazi
Amakipe asangiye ibitekerezo akora ibicuruzwa byiza, politiki, nibyemezo byo kwiga.
Kazoza Kurenga-Kwemeza
Nkuko imibare nicyitegererezo bigenda byiyongera, kwiruka k byuzuye byamahugurwa bigenda bihenze, nuko abimenyereza barushaho gushimangira ikintu kinini gifatika cyemewe cyo kwiga byimbitse mugihe babitse kwambukiranya amakuru mato mato cyangwa imbonerahamwe. Automatic ML nibikoresho nka scikit-wige GridSearchCV na Optuna bateka cross-kwemeza mubushakashatsi bwa hyperparameter kubisanzwe. Ubushakashatsi burakomeje kubigereranyo bihendutse, imiyoboro idashobora kumeneka, hamwe no kwemeza neza kubitsinda, ibyiciro, hamwe nigihe gishingiye kumibare.
Gushyira mu bikorwa Isi
Gukoresha inshuro 5 kunyuramo kugirango ugereranye gusubira inyuma, ishyamba ridasanzwe, hamwe no kuzamura buhoro buhoro mbere yo kwiyemeza icyitegererezo.
Gushyira mu byiciro k-inshuro ku busumbane bwuburiganya-gutahura dataset kuburyo buri bubiko bugumana hafi kimwe kimwe kidasanzwe-cyiciro.
Gukoresha GridSearchCV cyangwa RandomizedSearchCV, ihuza-ihuza buri hyperparameter ihuza kugirango uhitemo igenamiterere ryiza.
Gukoresha ibihe-bikurikirana (kuzunguruka / imbere-umunyururu) kwambukiranya agaciro kugirango usuzume ikigega cyangwa usabe iteganyagihe nta mahugurwa ku makuru azaza.
Ingaruka & Kurinda
Amakipe atandukanye arashobora gukoresha ijambo rimwe muburyo butandukanye, sobanura intera hakiri kare.
Ibipimo birashobora kugaragara bikomeye mugihe imikorere-yisi-itaringaniye.
Kwirengagiza ubuziranenge bwamakuru na gahunda yo gusuzuma akenshi bitanga ibisubizo byoroshye.
Igishushanyo mbonera
Tangira nururimi rusobanutse rwibisubizo ukeneye.
Toranya intsinzi imwe hamwe nuburyo bumwe bwo gutsindwa mbere yo kwipimisha.
Koresha umuderevu muto hamwe namakuru ahagarariye, ntabwo ari demo yashizweho.
Inyandiko aho Cross-Validation ifasha kandi nuburyo bworoshye bworoshye.
Komeza Ubushakashatsi
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Ubuyobozi bukurikira
Umusaraba-Encoders vs Bi-Encoders
Ibibazo bikunze kubazwa
What is Cross-Validation?
Kwambukiranya imipaka ni tekinike yo gusubiramo uburyo bwo kugereranya uburyo icyitegererezo kizajya kibona amakuru atagaragara. Ikoresha neza amakuru make kandi itanga igereranya ryimikorere yizewe kuruta gari ya moshi imwe / igabana.
Mubisanzwe k-inshuro zambukiranya-kwemeza, ni kangahe buri ngingo ikoreshwa mukugerageza?
Buri bubiko bukora nkikizamini cyashyizweho inshuro imwe k k kuzenguruka, buri sample rero igeragezwa mugihe kimwe kandi ikamenyerezwa ahasigaye.
Ni izihe nyungu nyamukuru za k-inshuro zinyuranya hejuru ya gari ya moshi imwe / igabana?
Ugereranije inshuro nyinshi, kwambukiranya-kugabanya kugabanya itandukaniro ryimikorere ugereranije no kwishingikiriza ku gutandukana uko bishakiye.
Ni ukubera iki bisanzwe k-byambukiranya-kwemeza bidakwiriye guhanura ibihe?
Guhindura igihe cyateganijwe amakuru asohora ejo hazaza mumahugurwa, bityo ibihe-bikurikirana CV ikoresha ibice-byimbere bigabanya imyitozo gusa kubyo twabonye kera.