Cov txheej txheem:
Video: Python siv Dijkstra's algorithm li cas?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Yuav ua li cas siv Dijkstra's algorithm hauv Python
- Los ntawm txhua qhov ntawm qhov tsis pom qhov chaw, xaiv lub vertex nrog qhov tsawg tshaj plaws nyob deb thiab mus xyuas nws.
- Hloov kho qhov kev ncua deb rau txhua tus nyob sib ze vertex, ntawm qhov mus ntsib vertex, nws qhov kev ncua deb tam sim no ntau dua nws cov lej thiab qhov hnyav ntawm ntug ntawm lawv.
- Rov ua cov kauj ruam 1 thiab 2 kom txog thaum tag nrho cov vertices raug mus xyuas.
Xav txog qhov no, Dijkstra's algorithm siv li cas?
thiab txhua lwm qhov ntawm ib daim duab.
Ntawm no yog yuav ua li cas lub algorithm yog siv:
- Kos tag nrho cov nodes li unvisited.
- Kos qhov pib xaiv node nrog qhov kev ncua deb ntawm 0 thiab tus so nrog infinity.
- Teem lub xub thawj raws li qhov tam sim no node.
yog Dijkstra BFS lossis DFS? Dijkstra cov algorithm yog Dijkstra's algorithm, nws tsis yog algorithm vim BFS thiab DFS lawv tus kheej tsis yog Dijkstra cov algorithm: BFS tsis siv qhov tseem ceeb queue (los yog array, yog tias koj xav siv qhov ntawd) khaws cia qhov deb, thiab. BFS tsis ua cov ntug kev so.
Tsis tas li ntawd, NetworkX yog dab tsi hauv Python?
NetworkX yog a Python pob khoom rau cov creation, manipulation, thiab kawm txog cov qauv, dynamics, thiab functions ntawm complex networks.
Dab tsi yog Dijkstra's algorithm nrog piv txwv?
Dijkstra's algorithm (los yog Dijkstra cov Txoj Kev Shortest Thawj algorithm , SPF algorithm ) yog ib algorithm txhawm rau nrhiav txoj hauv kev luv tshaj plaws ntawm cov nodes hauv daim duab, uas tuaj yeem sawv cev, rau piv txwv , kev networks. Rau qhov muab qhov node hauv daim duab, lub algorithm pom txoj kev luv tshaj ntawm qhov node thiab txhua lwm yam.
Pom zoo:
Peb siv cov lus sib txawv li cas nws siv li cas?
Daim ntawv SELECT DISTINCT yog siv los xa rov qab tsuas yog qhov sib txawv (sib txawv) qhov tseem ceeb. Hauv ib lub rooj, ib kem feem ntau muaj ntau qhov sib npaug; thiab qee zaum koj tsuas xav teev qhov sib txawv (sib txawv) qhov tseem ceeb
Prims algorithm siv rau dab tsi?
Hauv kev tshawb fawb hauv computer, Prim's (tseem hu ua Jarník's) algorithm yog qhov kev ntshaw algorithm uas nrhiav tau qhov tsawg kawg nkaus spanning ntoo rau qhov hnyav uas tsis muaj kev taw qhia. Qhov no txhais tau tias nws pom ib tug subset ntawm cov npoo uas tsim ib tsob ntoo uas suav nrog txhua vertex, qhov twg tag nrho qhov hnyav ntawm tag nrho cov npoo hauv tsob ntoo yog txo qis
Dab tsi yog qhov nyuaj ntawm Dijkstra's algorithm?
Lub sij hawm nyuaj ntawm Dijkstra's Algorithm yog O (V 2) tab sis nrog min-priority queue nws poob rau O (V + E l o g V)
Dab tsi yog kev siv algorithm hauv computer programming?
Lub programming algorithm yog txheej txheem khoos phis tawj uas zoo ib yam li daim ntawv qhia (hu ua txheej txheem) thiab qhia koj lub khoos phis tawj kom meej tias yuav ua li cas los daws qhov teeb meem lossis mus txog lub hom phiaj. Cov khoom xyaw hu ua inputs, hos cov ntsiab lus hu ua outputs
Koj siv Dijkstra txoj kev luv tshaj algorithm li cas?
Dijkstra's algorithm los nrhiav txoj hauv kev luv tshaj ntawm a thiab b. Nws xaiv lub vertex uas tsis tau mus ntsib nrog qhov qis tshaj plaws, suav qhov kev ncua deb ntawm nws mus rau txhua tus neeg nyob ze uas tsis tau mus xyuas, thiab hloov kho cov neeg nyob ze qhov deb yog tias me dua. Mark tau mus xyuas (teeb liab) thaum ua tiav nrog cov neeg nyob ze