Cov txheej txheem:

Yuav ua li cas koj xam nonlinear regression?
Yuav ua li cas koj xam nonlinear regression?

Video: Yuav ua li cas koj xam nonlinear regression?

Video: Yuav ua li cas koj xam nonlinear regression?
Video: Tsis Paub Yuav Ua Li Cas - maim lis 2024, Kaum ib hlis
Anonim

Yog koj qauv siv ib kev sib npaug hauv daim ntawv Y = a0 + b1X1, yog a linear regression qauv . Yog tsis yog, nws yog nonlinear.

Y = f(X, β) + ε

  1. X = a vector of p twv,
  2. β = ib vector ntawm k parameters,
  3. f(-) = paub regression muaj nuj nqi,
  4. ε = lub sij hawm yuam kev.

Ib yam li ntawd, nws raug nug, dab tsi yog tus qauv nonlinear regression?

Hauv kev txheeb cais, nonlinear regression yog ib daim ntawv ntawm tsom xam regression nyob rau hauv uas cov ntaub ntawv soj ntsuam yog qauv los ntawm ib tug muaj nuj nqi uas yog nonlinear kev sib xyaw ntawm cov qauv parameters thiab nyob ntawm ib los yog ntau yam kev hloov pauv ywj pheej. Cov ntaub ntawv yog haum los ntawm ib txoj kev ntawm successive approximations.

Qhov thib ob, dab tsi yog nonlinear regression siv rau? Nonlinear regression yog ib daim ntawv ntawm regression tsom xam nyob rau hauv uas cov ntaub ntawv yog haum rau ib tug qauv thiab ces qhia raws li ib tug lej muaj nuj nqi. Nonlinear regression siv logarithmic functions, trigonometric functions, exponential functions, thiab lwm yam haum txoj kev.

Hauv qhov no, koj yuav txiav txim siab li cas linear lossis nonlinear regression?

A linear regression equation tsuas sums cov nqe lus. Thaum lub qauv yuav tsum yog kab tawm nyob rau hauv parameters, koj tuaj yeem tsa qhov kev hloov pauv ywj pheej los ntawm tus exponent kom haum rau qhov nkhaus. Piv txwv li, koj tuaj yeem suav nrog lub sijhawm squared lossis cubed. Nonlinear regression cov qauv yog txhua yam uas tsis ua raws li daim ntawv no.

Dab tsi yog hom regression?

Hom Regression

  • Linear Regression. Nws yog qhov yooj yim tshaj plaws ntawm regression.
  • Polynomial Regression. Nws yog ib qho txheej txheem kom haum ib qho kev sib npaug nonlinear los ntawm kev noj cov dej num polynomial ntawm kev ywj pheej sib txawv.
  • Logistic Regression.
  • Quantile Regression.
  • Ridge Regression.
  • Lasso Regression.
  • Elastic Net Regression.
  • Thawj Cheebtsam Regression (PCR)

Pom zoo: