Cov txheej txheem:
Video: Yuav ua li cas muab cov kev hloov pauv hauv R?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Kev sib koom ua ke cov ntaub ntawv
Yog tias datasets nyob rau ntau qhov chaw, ua ntej koj yuav tsum tau import rau hauv R raws li peb tau piav qhia dhau los. Koj ua tau ua ke kab, los ntawm kev ntxiv tshiab sib txawv ; los yog koj ua tau ua ke kab, los ntawm kev ntxiv kev soj ntsuam. Txhawm rau ntxiv txhua kab siv cov haujlwm ua ke () uas yuav tsum tau cov ntaub ntawv uas koj yuav ua ke kom muaj kev sib koom sib txawv.
Raws li txoj cai, kuv yuav muab cov kab hauv R sib koom ua ke li cas?
Ua ke ob daim ntaub ntawv
- Kev piav qhia. Ua ke ob cov ntaub ntawv thav ntawv los ntawm kab ke los yog kab npe.
- Kev siv. merge(x, y, by, by.x, by.y, sort = TRUE)
- Kev sib cav. x,y os.
- Paub meej. Los ntawm lub neej ntawd cov ntaub ntawv thav ntawv yog merged rau ntawm kab nrog cov npe lawv ob leeg muaj, tab sis cais specifcations ntawm txhua kab tuaj yeem muab los ntawm.
- Tus nqi. Ib cov ntaub ntawv ncej.
- Saib ntxiv.
- Piv txwv.
Tsis tas li ntawd, kuv yuav rho tawm qhov hloov pauv hauv R li cas? rm(list=ls()) tshem tawm tag nrho sib txawv tam sim no loaded rau hauv nco nyob rau hauv R . Yog hais tias koj xav restore lub sib txawv uas tau txhais hauv koj cov cai, koj yuav tsum tau khiav cov cai uas txhais cov ntawd sib txawv dua. Tsuas yog khiav rm(list=ls()) hauv lub R console, tsis yog koj R Markdown ntaub ntawv!
Ntxiv rau qhov no, dab tsi yog qhov hloov pauv R?
A sib txawv yog lub npe muab rau qhov chaw nco, uas yog siv los khaws cov txiaj ntsig hauv computer program. Variables hauv R programming tuaj yeem siv los khaws cov lej (tiag tiag thiab nyuaj), cov lus, matrices, thiab txawm tias cov ntxhuav.
Kuv yuav txuag tau qhov sib txawv hauv R li cas?
Rau cawm cov ntaub ntawv raws li ib qho khoom siv RData, siv cov cawm muaj nuj nqi. Rau cawm cov ntaub ntawv raws li ib qho khoom siv RDS, siv saveRDS muaj nuj nqi. Nyob rau hauv txhua rooj plaub, thawj qhov kev sib cav yuav tsum yog lub npe ntawm tus R khoom koj xav tau cawm . Tom qab ntawd koj yuav tsum suav nrog cov ntaub ntawv sib cav uas muaj cov ntaub ntawv npe lossis kab ntawv koj xav tau cawm cov ntaub ntawv teem rau.
Pom zoo:
Dab tsi yog qhov hloov pauv hloov pauv hloov pauv hauv Java?
Default access modifier txhais tau hais tias peb tsis qhia meej txog kev hloov pauv nkag rau hauv chav kawm, teb, txoj kev, thiab lwm yam. Ib qho kev hloov pauv lossis txoj kev tshaj tawm yam tsis muaj kev tswj xyuas kev hloov pauv yog muaj rau lwm chav kawm hauv tib lub pob
Cov kev pabcuam lossis cov txheej txheem twg uas Secure Copy Protocol vam khom kom ntseeg tau tias kev hloov pauv kev nyab xeeb yog los ntawm cov neeg siv tau tso cai?
Cov kev pabcuam lossis cov txheej txheem twg uas Secure Copy Protocol vam khom kom ntseeg tau tias kev hloov pauv kev nyab xeeb yog los ntawm cov neeg siv tau tso cai? Secure Copy Protocol (SCP) yog siv los luam cov duab IOS kom ruaj ntseg thiab teeb tsa cov ntaub ntawv mus rau SCP server. Txhawm rau ua qhov no, SCP yuav siv SSH kev sib txuas los ntawm cov neeg siv uas tau lees paub los ntawm AAA
Vim li cas cov kev hloov pauv hloov pauv tsis yog serialized?
Transient yog Java lo lus tseem ceeb uas cim cov tswv cuab sib txawv tsis txhob raug serialized thaum nws pheej mus rau kwj ntawm bytes. Thaum cov khoom raug xa mus los ntawm lub network, cov khoom yuav tsum tau 'serialized'. Serialization hloov cov khoom lub xeev mus rau serial bytes
Kuv yuav muab cov kev hloov pauv hauv TFS li cas?
Mus rau Qhov Chaw Tswj Explorer hauv Visual Studio, right-click koj ceg, thiab xaiv cov ntawv qhia zaub mov tshiab-xaiv 'Merge Changeset By Comment'. Tom qab ntawd, nkag mus rau TFS yam khoom hauv kab lus. Nws yuav qhia koj tag nrho Changesets, thiab cov ntaub ntawv txuam nrog cov khoom TFS:
Kuv yuav muab cov kev hloov pauv hauv Visual Studio li cas?
2 Cov Lus Teb Mus rau Pab Pawg Explorer thiab xaiv cov ceg ntoo. Checkout master thiab nyem "Merge". Ib yam li Git hais kom ua, koj yuav tsum ua tus tswv kom sib koom ua ke dev ceg. Xaiv dev ntawm "Merge los ntawm ceg" ntawv qhia zaub mov thiab nyem Merge. Nco ntsoov tias kuv khaws "Kev hloov pauv tom qab sib koom ua ke" kos lub thawv rau