Video: Puas yog arrays matrices?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Peb tam sim no npaj txhij los tham txog ob sab arrays , npe matrices (singular: matrix ). A matrix zoo li lub rooj nrog kab thiab kab. Nws yog ua tau rau arrays kom muaj ntau qhov ntev. Ib qho peb sab array , piv txwv li, muaj 3 subscripts, qhov twg txhua qhov ntev yog sawv cev raws li subscript hauv lub array.
Hauv qhov no, matrix array yog dab tsi?
Array : Sau cov ntsiab lus homogeneous. Matrix : Ib kab yooj yim thiab kab ke. Ob leeg yog cov khoom sib txawv hauv qhov sib txawv. Tab sis nyob rau hauv lub computer programming, ib tug sau ntawm ib qhov ntev array tuaj yeem hu ua matrix . Koj tuaj yeem sawv cev ib 2d array (piv txwv li, sau ntawm ib qhov ntev arrays ) hauv matrix daim ntawv.
Ib yam li ntawd, puas yog 2d array ib tug matrix? Zoo li 1D array , a 2D array yog ib phau ntawm cov ntaub ntawv hlwb, tag nrho cov tib hom, uas yuav muab tau ib lub npe. Txawm li cas los xij, a 2D array yog koom ua ib tug matrix nrog ib tug xov tooj ntawm kab thiab kab.
Ntawm no, qhov txawv ntawm ib qho array thiab matrix yog dab tsi?
Matrix feem ntau implies ob qhov ntev, arrays feem ntau yog ib qhov me me tshwj tsis yog hais tias lwm yam. A matrix kuj yog ib lub tswv yim siv rau hierarchical 3d lej. A matrix muaj qhov loj me m * n (2d). Ib array muaj qhov loj me (1d), yog li nws yog qhov tshwj xeeb.
Dab tsi yog matrices siv rau?
Matrices yog ib txoj hauv kev muaj txiaj ntsig los sawv cev, tswj hwm thiab kawm cov kab ntawv qhia kab nruab nrab ntawm qhov chaw seem vector (yog tias koj tau xaiv lub hauv paus). Matrices tuaj yeem sawv cev rau cov ntaub ntawv plaub (nws yog qhov tseem ceeb, piv txwv li, hauv kev tshuaj xyuas los kawm hessian matrices , uas pab peb kawm txog tus cwj pwm ntawm cov ntsiab lus tseem ceeb).
Pom zoo:
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