Dab tsi yog s3 thiab s4 hauv R?
Dab tsi yog s3 thiab s4 hauv R?

Video: Dab tsi yog s3 thiab s4 hauv R?

Video: Dab tsi yog s3 thiab s4 hauv R?
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S3 yog ib qho yooj yim heev. Nws tsis muaj kev txhais cov chav kawm. S4 ua haujlwm zoo ib yam li S3 , tab sis yog formal ntau. Muaj ob qhov sib txawv loj rau S3 . S4 muaj cov lus txhais hauv chav kawm, uas piav qhia txog kev sawv cev thiab kev ua qub txeeg qub teg rau txhua chav kawm, thiab muaj kev pabcuam tshwj xeeb rau kev txhais cov qauv thiab cov txheej txheem.

Ntxiv mus, dab tsi yog s3 hauv R?

S3 hais txog cov chav kawm uas tsim los rau hauv R . Lub kaw lus tswj hwm li cas R tuav cov khoom ntawm cov chav kawm sib txawv. Muaj tseeb R functions yuav saib ib yam khoom S3 chav kawm, thiab tom qab ntawd coj txawv txawv hauv kev teb. Lub tshuab luam ntawv yog zoo li no.

Ib sab saum toj no, chav kawm R yog dab tsi? Nyob rau hauv object-oriented programming, a chav kawm yog lub hom phiaj rau ib yam khoom. Hauv R , txhua yam yog qhov khoom! Thaum twg koj tsim ib yam khoom tshiab, xws li vector, koj siv daim ntawv qhia / tsim rau cov khoom ntawd.

Ua kom pom qhov no, dab tsi yog chav kawm s4 hauv R?

Cov S4 system hauv R yog ib qhov system rau object oriented programing. Tsis meej pem, R muaj kev txhawb nqa tsawg kawg yog 3 qhov sib txawv rau cov khoom siv taw qhia: S3, S4 thiab S5 (tseem hu ua siv chav kawm ).

Dab tsi yog qhov kev ua haujlwm dav dav hauv R?

Kev piav qhia. Kev ua haujlwm dav dav (cov khoom los ntawm lossis ncua chav kawm genericFunction) txuas ntxiv muaj nuj nqi cov khoom, muaj cov ntaub ntawv siv los tsim thiab xa cov txheej txheem rau qhov no muaj nuj nqi . Lawv kuj txheeb xyuas cov pob uas cuam tshuam nrog muaj nuj nqi thiab nws txoj kev.

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