Yuav ua li cas yog ib tug univariate outlier?

2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47

A univariate outlier yog ib qho kev taw qhia cov ntaub ntawv uas muaj tus nqi siab ntawm ib qho kev sib txawv. Ib tug multivariate outlier yog qhov sib xyaw ua ke ntawm cov qhab nia txawv txawv ntawm tsawg kawg ob qhov sib txawv. Ob hom ntawm outliers tuaj yeem cuam tshuam cov txiaj ntsig ntawm kev txheeb xyuas kev txheeb xyuas.

Tib neeg kuj nug, daim duab twg yog siv los saib cov univariate outliers?

1. Univariate txoj kev. Ib txoj hauv kev yooj yim tshaj plaws rau kev kuaj xyuas outliers yog cov siv ntawm cov thawv ntawv. Ib lub thawv zaj yog graphical tso saib rau piav qhia txog kev faib cov ntaub ntawv. Lub thawv ntawv siv qhov nruab nrab thiab qis thiab sab sauv quartiles.

Ib tug kuj yuav nug, yuav ua li cas koj txheeb xyuas qhov outlier nyob rau hauv ib tug scatter plot? Yog ib qho point ntawm a tawg daim phiaj yog deb ntawm txoj kab regression dua li lwm qhov taw tes, ces tus tawg daim phiaj muaj tsawg kawg yog ib qho outlier . Yog hais tias ib tug xov tooj ntawm cov ntsiab lus yog tib qhov deb tshaj plaws ntawm txoj kab regression, ces tag nrho cov ntsiab lus no yog outliers.

Tsis tas li ntawd, qhov txawv ntawm Multivariate thiab univariate yog dab tsi?

Univariate thiab multivariate sawv cev rau ob txoj hauv kev rau kev txheeb xyuas statistical. Univariate koom nrog kev tsom xam ntawm ib qho kev hloov pauv thaum multivariate kev tshuaj ntsuam xyuas ob lossis ntau qhov sib txawv. Feem ntau multivariate tsom xam muaj ib tug txawv variable thiab ntau yam txawv txawv variables.

Dab tsi yog qhov txawv ntawm outliers?

Peb hom ntawm outliers

• Hom 1: Global Outliers (tseem hu ua "Point Anomalies"):
• Ntiaj teb no Anomaly:
• Hom 2: Contextual (Conditional) Outliers:
• Contextual Anomaly: Cov txiaj ntsig tsis yog sab nraud ntawm lub ntiaj teb ib txwm muaj, tab sis yog txawv txav piv rau cov qauv raws caij nyoog.
• Hom 3: Collective Outliers: