Nyob rau lub sijhawm kwv yees?

Cov txheej txheem:

Nyob rau lub sijhawm kwv yees?
Nyob rau lub sijhawm kwv yees?

Video: Nyob rau lub sijhawm kwv yees?

Video: Nyob rau lub sijhawm kwv yees?
Video: tuav wb lub neej kom ruaj khov - Mang Vang ft. Christina Xyooj [Official Audio] 2021-22 2024, Kaum ib hlis
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Lub sijhawm kwv yees tshwm sim thaum koj ua qhov kev kwv yees raws li keeb kwm lub sijhawm sau cov ntaub ntawv. Nws koom nrog kev tsim cov qauv los ntawm kev txheeb xyuas keeb kwm thiab siv lawv los ua kev soj ntsuam thiab tsav kev txiav txim siab rau yav tom ntej.

Koj siv sijhawm li cas los ua huab cua?

Sijhawm Series Huab cua hauv R

  1. Kauj Ruam 1: Nyeem cov ntaub ntawv thiab suav cov ntsiab lus tseem ceeb. …
  2. Kauj Ruam 2: Tshawb xyuas lub voj voog ntawm Sijhawm Series Cov Ntaub Ntawv thiab teeb tsa cov ntaub ntawv nyoos. …
  3. Kauj Ruam 3: Decomposing lub sij hawm series cov ntaub ntawv. …
  4. Kauj Ruam 4: Ntsuas qhov chaw nyob ntawm cov ntaub ntawv. …
  5. Kauj Ruam 5: Haum rau tus qauv. …
  6. Kauj Ruam 6: Kev Huab Cua.

Puas yog lub sijhawm siv los kwv yees?

Lub sijhawm kwv yees series yog siv tus qauv los kwv yees cov txiaj ntsig yav tom ntej raws li cov txiaj ntsig tau pom yav dhau los. Lub sij hawm series tau dav siv rau cov ntaub ntawv tsis nyob ruaj ruaj, xws li kev lag luam, huab cua, nqi Tshuag, thiab kev muag khoom muag hauv cov ntawv tshaj tawm no.

4 yam ntawm lub sijhawm yog dab tsi?

plaub yam no yog:

  • Secular trend, uas piav txog lub zog raws lub sijhawm;
  • Seasonal variations, uas sawv cev rau kev hloov raws caij nyoog;
  • Cyclical fluctuations, uas sib haum mus rau lub sij hawm tab sis tsis raws caij nyoog variations;
  • Irregular variations, uas yog lwm yam nonrandom qhov chaw ntawm variations ntawm series.

Tus qauv zoo tshaj plaws rau lub sijhawm kwv yees yog dab tsi?

Raws li kev nthuav tawm smoothing, kuj ARIMA qauv yog cov kev siv dav tshaj plaws rau lub sijhawm kwv yees. Lub npe yog lub ntsiab lus rau AutoRegressive Integrated Moving Average. Nyob rau hauv tus qauv AutoRegressive cov kev kwv yees sib raug rau cov kab sib txuas ntawm cov txiaj ntsig yav dhau los ntawm qhov sib txawv.

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