Ukusuka kwisicatshulwa esinikiweyo, ndidwelise iinkcukacha malunga nesicwangciso sokulingana
Context:Igrafu yokulingana yi-scatterplot ethelekisa iseti yeziphumo ezivela kwimodeli yekhompyutha ngokuchasene nedatha yomgangatho. Inqaku ngalinye linama-coordinates (x, y), apho i-x lixabiso lokulinganisa kwaye i-y lixabiso elihambelanayo elivela kwimodeli.  Umgca we equation y = x, omele ukusebenza kwemodeli egqibeleleyo, ngamanye amaxesha wongezwa njengereferensi. Apho imodeli iphindaphinda ngempumelelo umgangatho, loo ndawo iya kuba kumgca.  Iiplothi zokulingana zifumaneka kumaphepha enzululwazi kunye neengxelo, xa umbhali efuna ukuqinisekisa imodeli ngendlela ebonakalayo. Nangona kunjalo, xa idatha inoluhlu olubanzi, isikali esikhulu senza ukungafani okubalulekileyo kungabonakali kwaye imodeli ibonakala ingcono kunokuba injalo. Kwimeko enjalo, iplani yeempazamo zemodeli [(y-x) vs. x] ilunge ngakumbi ukuvavanya ukusebenza kwemodeli.
1. Iintsana Igrafu yokulingana yi-scatterplot ethelekisa imveliso yemodeli yekhompyutha nedatha yesalathiso. 2. Ixesha Inqaku ngalinye libonakaliswa ngoonxibelelanisi balo (x, y), apho x imele ixabiso lokulinganisa kwaye y lixabiso elihambelanayo kwimodeli. 3. Iintshaba Ukuze kusetyenziswe njengesalathiso, umgca otsaliwe kwi equation y = x uyabandakanywa ngamanye amaxesha. Apho imodeli iphinda ivelise ngokuchanekileyo umlinganiso, loo ndawo iya kuwa kumgca. 4. Xa umbhali efuna ukuqinisekisa imodeli kwiphepha okanye kwingxelo, iiplothi zokulingana zisetyenziswa. Kwelinye icala, xa inkcazelo eninzi, umlinganiselo omkhulu awubonakali, nto leyo eyenza imodeli ibonakale ingcono kunokuba injalo. Kwimeko enjalo, umzobo wempazamo yemodeli [(y-x) vs. x] yeyona nto ilungileyo ekuvavanyeni ukusebenza kwemodeli.