R

Izithuba ezimhlophe ezikhokelayo nezilandelayo kulo naluphi na uhlobo lwekhowudi ingaba ngumba abasoloko bedibana nabaphuhlisi. Oku kuxhaphake ngakumbi ekusetyenzweni kwedatha kunye nokucoca, apho idatha ekrwada inokubandakanya izithuba ezingafunekiyo ezinokuthi ziphazamise iinkqubo zakho okanye uhlalutyo. Kwinkqubo ye-R, ulwimi olufikelelekayo nolusetyenziswa ngokubanzi phakathi koosozibalo kunye nabasebenzi basezimayini bedatha, aba bangaphandle kufuneka baphathwe ngokufanelekileyo ukuqinisekisa ukuba iinkqubo zakho zihamba kakuhle kunye nokuchaneka kweziphumo zakho.

# R ikhowudi yomzekelo
my_string <- " Izithuba ezimhlophe ezikhokelayo kunye ezirhuqwayo " trimmed_string <- trimws(my_string) print(trimmed_string) [/code]

Funda Okuninzi

Udweliso lwe-R lulwimi lwenkqubo oluvulelekileyo olusetyenziswa kakhulu kwikhompyutha yamanani kunye nemizobo. Idume kakhulu phakathi kwabahlalutyi bedatha, abaphandi, kunye nabathengisi ngokulula kwayo ukusetyenziswa kunye namandla okuhlaziya idatha. Kwi-R, sihlala sisebenzisa iipakethe - ukuqokelelwa kwemisebenzi ye-R, idatha, kunye nekhowudi ethotyelwayo - enika amandla okwenza imisebenzi ethile. Ngamanye amaxesha, kunokufunwa ukususa ezi phakheji, kwaye oku kunokuba ngumngeni. Eli nqaku liza kubonelela ngesikhokelo esibanzi sendlela yokususa iipakethe kwi-R.

Funda Okuninzi

Ukuchaza umtya kunye nokukhangela i-substring ngaphakathi kwayo yinkqubo eqhelekileyo kuhlalutyo lokubhaliweyo. Yiba kwimigodi yedatha, ukufunyanwa kolwazi, okanye ukuguqulwa komtya olula, sihlala sizifumana sivavanya ukuba umtya omncinci, okanye umtya omncinci, ufunyenwe ngaphakathi komtya omkhulu. Lo ngumsebenzi owenziweyo Inkqubo, inokuphunyezwa ngokukhawuleza nangempumelelo.

Funda Okuninzi

Umsebenzi wokuthumela i-DataFrame kwifayile ye-Excel kwi-R ilula kakhulu inkqubo yokuhlalutya idatha. Esikhundleni sokukopisha ngesandla kunye nokunamathisela idatha kwi-Excel, okanye ukulahlekelwa ulwazi olubalulekileyo ekudluliseni, ukuthumela ngaphandle kweDathaFrame ngokuthe ngqo kwi-Excel yindlela esebenzayo nethembekileyo yokubonisa idatha, ukugcinwa, kunye nohlalutyo olongezelelweyo.

Ekufundeni ukwenza lo msebenzi, umntu uphucula kakhulu amandla akhe okuphatha idatha kwi-R. Ayikongi nje ixesha, ikwaqinisekisa nokugcinwa kwemfezeko yedatha.

Funda Okuninzi

intshayelelo

Funda Okuninzi

Kwihlabathi elinomdla lokuphathwa kwedatha kunye nekhompyuter yezibalo, inkqubo ye-R isebenza njengentsika yesiseko, ibonelela ngezixhobo ezomeleleyo zezicelo ezahlukeneyo. Enye yeengxaki ezibangela umdla esihlala sidibana nazo kukukhupha amanani awodwa kwikholamu kwisakhelo sedatha, umsebenzi obalulekileyo ekusetyenzweni kwangaphambili kwedatha kunye nokuhlola. Masingene nzulu kwesi sihloko, sikunika ikhowudi, ukuqonda, kunye neendawo ezinokwenzeka zesicelo sale ngxaki inomdla.

Funda Okuninzi

Ngokuqinisekileyo, masiqale ukubhala inqaku malunga nendlela yokudwelisa zonke iipakethe ezifakiweyo kwi-R.

Ulwimi lwenkqubo ye-R sisixhobo esibalulekileyo sophuhliso kwi-computing yamanani kunye nentsimi yemizobo. Phakathi kwezinto zayo, i-R ivumela iindlela ezininzi zokujonga ukuba zeziphi iipakethe ezifakwe ngoku. Amandla okuhlola nokusebenzisa ezi phakheji zikhoyo zongeza ukuguquguquka kwikhowudi yakho ye-R kwaye inokuchaphazela kakhulu uhlalutyo lwakho. Eli nqaku ligxile ekuboniseni iindlela ezahlukeneyo zokudwelisa zonke iipakethe ezifakiweyo kwi-R.

Funda Okuninzi

Kuluhlu olubanzi lokuhlalutya idatha kunye nokusebenza kwedijithali, ukucutshungulwa kwabalinganiswa be-ASCII, ngokuchanekileyo abo banee-accents, babambe indawo ebalulekileyo. I-ASCII (i-American Standard Code for Information Interchange) yaphuhliswa ukulungelelanisa indlela iikhomputha ezimele ngayo idatha yombhalo. Zezi khowudi ze-ASCII ezimisela ukuba izixhobo zakho zedijithali zibonisa iimpawu ezithile. Eli nqaku licacisa ngakumbi ngee-accents ze-ASCII, indima yazo ekuphatheni isicatshulwa, kunye nendlela onokuthi ulawule ngayo loo zwi usebenzisa i-R.

Funda Okuninzi

Ngexesha lohlalutyo lwamanani kunye nokufunda koomatshini, inkqubo ye-R ibonelela ngesicelo sokugcina kunye nokulayisha idatha ngenjongo yokuyisebenzisa kwakhona xa kuyimfuneko. Ukusebenzisa eli nqaku kubalulekile ekwenzeni inkqubo yakho yokuhlalutya isebenze ngokugcina ixesha kunye nezixhobo zokubala. Ivumela ukuphathwa ngokukhawuleza kwedatha, ukuthintela imfuno yokuqhuba izikripthi okanye izibalo ezinzima ngalo lonke ixesha. I-Rdata yifomati yefayile esetyenziselwa ukugcina izinto ze-R kwimo yokubini engalayishwa umva ku-R xa ifunwa. Eli nqaku liza kuthetha ngamabomu kwinkqubo yokugcina kunye nokulayisha idatha usebenzisa i-RData kwi-R yokucwangcisa inyathelo ngenyathelo lenkcazo yecandelo lekhowudi esiza kuyisebenzisa ukwenza njalo.

Funda Okuninzi