2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Holdout Set yog dab tsi? Qee lub sij hawm hu ua "kev sim" cov ntaub ntawv, lub chaw tuav pov hwm muab qhovqhov kawg kwv yees ntawm lub tshuab kev kawm qauv kev ua tau zoo tom qab nws tau raug cob qhia thiab siv tau. Holdout sets yuav tsum tsis txhob siv los txiav txim siab txog qhov twg algorithms siv los yog kev txhim kho lossis kho algorithms.
Puas hla kev lees paub zoo dua li kev tuav pov hwm?
Cross-validation feem ntau yog txoj kev nyiam vim nws muab sijhawm rau koj tus qauv los cob qhia ntau lub tsheb ciav hlau-kuaj sib cais. Qhov no muab rau koj ib qho kev qhia zoo dua ntawm koj tus qauv yuav ua tau zoo npaum li cas ntawm cov ntaub ntawv tsis pom. Tuav-tawm, ntawm qhov tod tes, yog nyob ntawm ib qho kev sib tw tsheb ciav hlau xwb.
Kev tuav pov hwm yog dab tsi?
Holdout Method yog hom kev yooj yim tshaj plaws los ntsuas tus cais tawm. Nyob rau hauv txoj kev no, cov ntaub ntawv teev (cov ntaub ntawv sau los yog cov piv txwv) tau muab cais ua ob pawg, hu ua Training set and Test set. Tus classifier ua haujlwm ntawm kev muab cov ntaub ntawv hauv cov khoom sau rau hauv hom phiaj lossis chav kawm.
Kuv puas yuav tsum ua qhov kev lees paub hla dhau?
Kev hla kev lees paub dav dav yog ib txwm xav tau thaum koj xav tau los txiav txim siab qhov kev pom zoo ntawm tus qauv, rau logistic regression qhov no yuav yog C parameter.
K-fold cross validation yog dab tsi?
yog tias koj piv cov xeem-MSEs yog qhov zoo dua yog tias k-fold CV dua LOOCV. k-fold CV lossis ib qho CV lossis resampling txoj kev tsistxhim kho qhov kev xeem yuam kev. lawv kwv yees qhov kev xeem yuam kev. nyob rau hauv rooj plaub ntawm k-fold, nws ua txoj haujlwm zoo dua ntawm kev kwv yees yuam kev dua LOOCV.
Pom zoo:
Puas pov hwm pov hwm kev tiv thaiv kab mob mastectomy?
Tsis muaj tsoomfwv txoj cai lij choj xav kom cov tuam txhab pov hwm pov hwm them tus kabmob prophylactic mastectomy. Qee lub xeev txoj cai lij choj xav tau kev pab them nqi kho mob prophylactic mastectomy, tab sis kev pab them nqi sib txawv hauv xeev.
Thaum twg tus neeg tuav pov hwm tuaj yeem so haujlwm?
Cov tswvcuab uas suav 20 lossis ntau dua xyoo ntawm kev pabcuam tsim nyog tau txais kev pabcuam nyiaj laus thaum lawv mus txog hnub nyoog 60 lossis, qee zaum, muaj hnub nyoog tsawg dua. Muaj ob txoj kev npaj nyiaj laus uas tsis muaj kev xiam oob khab tam sim no pib siv rau cov neeg laus laus uas tsim nyog.
Puas rov tuav pov hwm rov qab xav tau cov neeg tuav pov hwm rov qab?
Cov tuam txhab tuav pov hwm rov qab feem ntau yuav rov ua pov hwm lawv tus kheej, lub sij hawm hu ua retrocession. Ntau txoj cai tau nthuav tawm ntawm ntau tus neeg tuav pov hwm rov qab. Nyob rau hauv rooj plaub no, qhov kev sib pauv yuav koom nrog tus thawj coj rov tuav pov hwm uas yuav sib tham txog cov ntsiab lus ntawm txoj cai uas lwm tus neeg tuav pov hwm rov qab yuav koom nrog.
Thaum cov tuam txhab tuav pov hwm yuav kev pov hwm los ntawm cov tuam txhab tuav pov hwm ncaj qha?
Hauv cov ntsiab lus yooj yim, kev tuav pov hwm rov qab yog kev tuav pov hwm rau cov tuam txhab tuav pov hwm muab hauv daim ntawv cog lus ntawm kev them nyiaj tsis yog daim ntawv cog lus lav. Feem ntau, tus neeg tuav pov hwm ncaj qha yuav tsum xub them qhov poob thiab tom qab ntawd nrhiav nyiaj rov qab rau qhov kev poob ntawd los ntawmnws cov nyiaj rov qab.
Daim ntawv pov hwm kev tuav pov hwm ncaj ncees yog dab tsi?
Kev pov hwm tus nqi ncaj ncees. tus nqi fajseeb khomob rau lub sijhawm teem sijhawm sib npaug li qhov xav tau them rau tib lub sijhawm(yog li tuam txhab tuav pov hwm yuav tsis muaj nyiaj. Txoj kev tuav pov hwm ncaj ncees yog dab tsi? Xav txog kev tuav pov hwm uas yog qhov ncaj ncees, txhais tau tias tus nqi them yog sib npaug rau cov kev thov xav tau:
