Video: Dab tsi yog qhov sib txawv loj ntawm univariate bivariate thiab multivariate tsom xam?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Univariate thiab multivariate sawv cev rau ob txoj hauv kev rau kev txheeb cais tsom xam . Univariate koom nrog tsom xam ntawm ib qho txawv txav thaum kev tsom xam ntau yam tshuaj xyuas ob lossis ntau qhov sib txawv. Feem ntau kev tsom xam ntau yam suav nrog ib qho kev hloov pauv thiab ntau yam hloov pauv ywj pheej.
Tsis tas li ntawd, qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv thiab kev txheeb xyuas ntau yam sib txawv yog dab tsi?
Tsis tas li ntawd, qee txoj kev koj tuaj yeem tso tawm ib leeg cov ntaub ntawv muaj xws li cov lus faib zaus, kab kos kab, kab ntawv histograms, ntau zaus polygons, thiab kab kos duab. Kev tsom xam bivariate yog siv los xyuas seb puas muaj kev sib raug zoo nruab nrab ob txawv sib txawv. Kev txheeb xyuas ntau yam yog cov tsom xam ntawm peb lossis ntau qhov sib txawv.
Tom qab ntawd, lo lus nug yog, dab tsi yog qhov piv txwv ntawm kev txheeb xyuas ntau yam? Piv txwv ntawm multivariate regression Piv txwv 1. Ib tus kws tshawb fawb tau sau cov ntaub ntawv ntawm peb qhov kev hloov pauv ntawm lub hlwb, plaub qhov kev hloov pauv kev kawm (cov qhab nia xeem tus qauv), thiab hom kev kawm uas tus tub ntxhais kawm nyob rau hauv 600 cov tub ntxhais kawm theem siab. Ib tug kws kho mob tau sau cov ntaub ntawv ntawm cov roj cholesterol, ntshav siab, thiab qhov hnyav.
Ib yam li ntawd, koj tuaj yeem nug, qhov txawv ntawm qhov kev txheeb xyuas qhov sib txawv thiab kev txheeb xyuas bivariate yog dab tsi?
Nws yog ib qho ntawm cov ntaub ntawv yooj yim tshaj plaws ntawm kev txheeb cais tsom xam , siv los xyuas seb puas muaj kev sib raug zoo nruab nrab ob pawg ntawm cov nqi. Kev tsom xam tsis sib xws yog cov tsom xam ntawm ib ("uni") variable. Kev tsom xam bivariate yog cov tsom xam ntawm raws nraim ob qhov sib txawv. Multivariate tsom xam yog cov tsom xam ntawm ntau tshaj ob qhov sib txawv.
Dab tsi yog qhov kev tshawb nrhiav univariate hauv kev tshawb fawb?
Kev tsom xam tsis sib xws yog daim ntawv yooj yim tshaj plaws ntawm kev txheeb xyuas cov ntaub ntawv. "Uni" txhais tau tias "ib", yog li hauv lwm lo lus koj cov ntaub ntawv tsuas muaj ib qho sib txawv. Nws tsis cuam tshuam nrog qhov ua rau lossis kev sib raug zoo (tsis zoo li regression) thiab nws lub hom phiaj tseem ceeb yog piav qhia; nws siv cov ntaub ntawv, sau cov ntaub ntawv thiab nrhiav cov qauv hauv cov ntaub ntawv.
Pom zoo:
Dab tsi yog qhov sib txawv ntawm qhov kev txiav tawm thiab qhov kev sib cav Ampliative?
Yog hais tias tus arguer ntseeg hais tias qhov tseeb ntawm qhov chaw yeej tsim qhov tseeb ntawm qhov xaus, ces qhov kev sib cav yog deductive. Yog hais tias tus arguer ntseeg hais tias qhov tseeb ntawm qhov chaw muab tsuas yog vim li cas zoo los ntseeg qhov xaus yog tej zaum muaj tseeb, ces qhov kev sib cav yog inductive
Dab tsi yog qhov sib txawv ntawm lub thawv thiab lub thawv ntawv thiab lub thawv ntawv yog dab tsi?
Ib lub thawv thiab cov ntawv nplawm (qee zaum hu ua boxplot) yog ib daim duab uas nthuav tawm cov ntaub ntawv los ntawm tsib lub ntsiab lus. Nyob rau hauv ib lub thawv thiab whisker zajlus: qhov kawg ntawm lub thawv yog lub sab sauv thiab sab quartiles, yog li lub thawv spans lub interquartile ntau yam. qhov nruab nrab yog cim los ntawm ib txoj kab ntsug hauv lub thawv
Dab tsi yog qhov sib txawv ntawm qhov sib xyaw ua ke thiab qhov qub txeeg qub teg?
Txawm hais tias ob qho tib si Inheritance thiab Composition muab code reusablelility, qhov sib txawv tseem ceeb ntawm Composition thiab Inheritance nyob rau hauv Java yog tias Composition tso cai rov qab siv code yam tsis tau ncua nws tab sis rau Inheritance koj yuav tsum ncua chav kawm rau ib qho kev rov qab siv code lossis functionality
Dab tsi yog qhov zoo sib xws thiab qhov txawv ntawm relays thiab PLC yog dab tsi?
Relays yog electro-mechanical keyboards uas muaj coil thiab ob hom kev sib cuag uas tsis yog NO & NC. Tab sis Programmable Logic Controller, PLC yog lub khoos phis tawj me uas tuaj yeem txiav txim siab raws li qhov kev zov me nyuam thiab nws cov tswv yim & tso tawm
Dab tsi yog qhov sib txawv tseem ceeb ntawm kev sib txuas lus tsis sib xws thiab kev sib txuas lus taw qhia?
1. Hauv kev sib txuas lus tsis muaj kev sib txuas lus tsis tas yuav tsim kev sib txuas ntawm qhov chaw (sender) thiab qhov chaw (receiver). Tab sis nyob rau hauv kev sib txuas-taw qhia kev sib txuas lus kev sib txuas lus yuav tsum tau tsim ua ntej hloov cov ntaub ntawv