ROC Curves uye AUC
ROC curve inoronga kuti mugadziri anopatsanura sei makirasi maviri padanho rega rega resarudzo, uye AUC inomanikidza iyo curve yese kuita nhamba imwe.
Pfupiso
Together they tell you ranking quality independent of where you draw the cutoff.
Kudzika Kwakadzika
A Receiver Operating Characteristic (ROC) curve inoronga True Positive Rate (sensitivity, on the y-axis) vachipesana neNhema Yakanaka Mwero (1 minus chaiyo, pa x-axis) paunenge uchitsvedza chikumbaridzo chechikamu kubva pa1 kusvika ku0. Chikumbaridzo chega chega chinopa poindi imwe; kudzibatanidza kunoronda curve. Modhi inoisa chese chakanaka pamusoro pese yakaipa inombundira kona yepamusoro-kuruboshwe. Iyo Area Under the Curve (AUC) inoyera iyo yakazara nzvimbo pasi pemutsara uyu, kubva pa0.5 (random guessing, the diagonal) kusvika 1.0 (yakakwana). Tsanangudzo inobatsira: AUC yakaenzana nemukana wekuti modhi yacho inowana yakasarudzika yakasarudzwa yakanaka kupfuura yakasarudzwa zvisina tsarukano. Izwi rinobva kuHondo Yenyika II radar vanoshanda vanosiyanisa chiratidzo kubva kune ruzha.
Technical Insight
AUC inozvimiririra pachikumbaridzo nekuti inobatanidza mashandiro pane ese cutoffs, saka haina kukanganiswa nekwaunoseta muganho wesarudzo. Yakaenzana nemasvomhu nenhamba yeMann-Whitney U uye Wilcoxon rank-sum bvunzo, zvichireva kuti zvinoenderana chete nedanho rekurongeka kwezvibodzwa zvakafanotaurwa, kwete maitiro avo akakwana. Izvi zvinoita kuti igadzikane pasi pe monotonic mamakisi eshanduko asi zvakare isinganetseke pakuenzanisa: yakanyatsorongeka asi isina kurongeka modhi inogona kuramba iine yakakwira AUC.
Strategic Impact
Sarudzo dzakajeka
Inokubatsira kuparadzanisa zvakajeka zvichemo zvehunyanzvi kubva mumutauro wekushambadzira.
Mutengo uye bhajeti
Iwe unogona kubvunza zvirinani kuita mibvunzo usati washandisa mari kana nguva.
Team uye workflow
Zvikwata zvine nzwisiso yakagovaniswa inoita zvirinani chigadzirwa, mutemo, uye sarudzo dzekudzidza.
Ramangwana reROC Curves uye AUC
ROC-AUC inoramba iine metric yekubika, asi varapi vanowedzera kuibatanidza nePrecision-Recall macurves e data isina kuenzana zvakanyanya, uko ROC inogona kutaridzika inonyengera tariro. Tarisira kugamuchirwa kwakakura kwechikamu cheAUC (ichitarisa kune yakaderera-yenhema-yakanaka dunhu iro rine basa nekushanda), inoteedzera mutengo uye sarudzo-curve ongororo, uye ne-sub-boka reAUC rinoshuma kune pamusoro pemapundu. Sezvo mamodheru achidya sarudzo chaidzo, calibration metrics uye AUC ichawedzera kutaurwa parutivi pane AUC chete.
Real-World Implementation
Kuenzanisa maviri ehutsotsi-yekuona mamodhi ebhangi neAUC yavo kuti vatore iyo inonyanya kuenzanisa kutengeserana kwehutsotsi pamusoro peiyo iri pamutemo.
Kuongorora kuongororwa kwechirwere chechirwere (semuenzaniso, kenza yekuongorora classifier) uko radiologist inoda kutengeserana nekubata dzimwe nyaya dzichipokana nearamu enhema.
Kugadzirisa chikumbaridzo chesefa uchishandisa ROC curve kuchengetedza manyepo (tsamba dzepamutemo dzakashongedzerwa se spam) dzakaderera zvakanyanya.
Kuenzanisa kiredhiti-default scoring modhi apo AUC inopfupikisa kuti inoparadzanisa sei vanokwereta vanodzorera kubva kune avo vanotadza.
Njodzi & Guardrails
Zvikwata zvakasiyana zvinogona kushandisa izwi rimwechete zvakasiyana, saka tsanangura nzvimbo nekukurumidza.
Benchmarks inogona kutaridzika yakasimba nepo chaiyo-yenyika kuita isina kuenzana.
Kuregeredza mhando yedata uye zvirongwa zvekuongorora zvinowanzogadzira mhedzisiro isina kusimba.
Implementation Roadmap
Tanga netsanangudzo yemutauro wakajeka yemhedzisiro yaunoda.
Sarudza metric imwe yekubudirira uye imwe yekutadza mamiriro usati waedzwa.
Mhanya mutyairi mudiki ane data remumiriri, kwete demo rakakwenenzverwa.
Nyora uko ROC Curves uye AUC inobatsira uye uko nzira dzakareruka dziri nani.
Ramba Uchiongorora
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Gaidhi rinotevera
Bias-Musiyano Tradeoff
Mibvunzo inowanzo bvunzwa
What is ROC Curves and AUC?
ROC curve inoronga kuti mugadziri anopatsanura sei makirasi maviri padanho rega rega resarudzo, uye AUC inomanikidza iyo curve yese kuita nhamba imwe. Pamwe chete vanokuudza mamiriro emhando yakazvimirira pane kwaunodhirowa cutoff.
Ndeapi huwandu huviri hunoitwa neROC curve kurongana?
ROC curve inoronga Yechokwadi Positive Rate (sensitivity) pane y-axis ichipokana neNhema Positive Rate (1 - hunhu) pane x-axis mhiri kwezvikumbaridzo.
Ndeipi AUC kukosha inoenderana neye classifier isingaite zvirinani pane kungofungidzira?
A random classifier anoteedza diagonal mutsara, achipa AUC ye0.5. Iyo AUC ye1.0 yakakwana, uye 0.0 zvinoreva kuti inowana chese chese kumashure chaiko.
Sei AUC ichitsanangurwa se 'chikumbaridzo-chakazvimiririra'?
AUC inopfupikisa iyo yose ROC curve, iyo inogadzirwa nekutsvaira kwese chikumbaridzo, saka haibvi pane chero yakasarudzwa yakasarudzwa cutoff.
Kune yakanyanya kusaenzana dataset, ndeipi curve inowanzo kurudzirwa padivi kana panzvimbo yeROC nekuti ROC inogona kutarisika yakanyanyisa tariro?
Pamatambudziko asingawanzo-akanaka huwandu hukuru hwechokwadi husina kunaka hunochengeta iyo False Positive Rate yakaderera, ichiwedzera ROC. Precision-Yeuka ma curves anotarisa pane yakanaka kirasi uye anoratidza mashandiro akanyanya kutendeseka.