The chigawo chachikulu

Mbali yaikulu zachokera akuyesera kuti afotokoze mlingo pazipita masiyanidwe mu akonzedwa ena a zosintha, ndi zochokera kwa zinthu mu malumikizanidwe masanjidwewo opendekera. Pali njira ina yochokera pa kusanthula chinthu, umalimbana ndikukhazikitsa ndi chiyerekezo cha malumikizanidwe masanjidwewo ntchito nambala inayake zinthu (pasanathe nambala anakonzeratu za zosintha), koma mwa njira chiyerekezo kwambiri kumasiyana ndi njira yoyamba akufuna.

Choncho, njira kusanthula chinthu akhoza kufotokoza malumikizanidwe pakati pa zosintha okha, ndi zochokera pa miyambo ya mtundu malumikizanidwe masanjidwewo kunja ake diagonally.

Kuchokera pa ntchito zothandiza kuyesetsa kumvetsa kufunika ntchito njira ina. Factor kusanthula ntchito pamene pali chidwi ofufuza kuphunzira ubale zosintha, ndi yaikulu kusanthula chigawo ntchito pamene kufunika kuchepetsa gawo deta ndi Pamlingo wamng'ono kumasulira kwawo chofunika.

Zinachitikira wathu, tikutha kuona kuti njira kusanthula Chinthu ntchito nambala mokwanira lalikulu kuzipenya. ndalamazo ayenera kukhala ndi dongosolo la udzakwaniritsidwa kuposa chiwerengero cha zinthu sakudziwika.

The chigawo chachikulu chotchuka kwambiri kufufuza malonda, monga zikhoza kugwiritsidwa ntchito mu kukhalapo kwa deta multicollinearity gwero. Mu ndondomeko ya msika mafunso kafukufuku muli mafunso ngati amenewa, ndi mayankho kwa iwo ndipo kutsatira mfundo za multicollinearity.

Mbali yaikulu m'pofunika kuganizira ya zizindikiro zomwe ziyenera kuti kafukufuku amatsogolera chisanadze kusankha zigawo zikuluzikulu kapena zinthu. Ofunika kwambiri awa ndi eigenvalues ndi mawu mlingo wa kupezeka kwa zosintha ndi zinakhalako chinthu ichi. Pali wina ulamuliro yofunika kwambiri chala, zomwe ndi zothandiza kwambiri kuyerekeza chiwerengero cha zinthu ziti (ayenera kukhala ngati pali eigenvalues kuposa wina). lamulo ili angafotokoze pang'ono kosavuta - ndi eigenvalues kufotokoza gawo la variances dekhetsa wa zosintha limene limafotokoza zinthu, ndipo ngati kupyoza wagawo ake ayenera kusonyeza dispersions amene ali variable kuposa wina.

M'pofunika kulongosolerana kamodzinso ulamuliro wa "eigenvalues munthu" - wazotsatira, ndipo kufunika kwa ntchito zake zitha anatsimikiza ndi kafukufuku wa. Mwachitsanzo, eigenvalue ali ndi phindu pasanathe umodzi, koma chifukwa kufala kwa, anagawira pakati zosintha lapansi. Wina wodziwa m'munda wa malonda Nkofunika kuti kugawanika tinakambirana zinthu zinali zomveka yokulirapo. Ndipo zinthu zimenezo, munali eigenvalues oposa mmodzi, koma alibe kutanthauzira watanthauzo, iwo n'komwe. Ndipo zikhoza kukhala zinthu sizitero.

nkhani ina yokhudza ntchito yeniyeni ya njira kusanthula chinthu - funso kasinthasintha wa. Mwina kuonedwa mipata imeneyi kasinthasintha. Wotchuka kwambiri wa iwo - varimax njira. Bukuli lili pa mlingo pazipita kupezeka kwa zosintha pa chilichonse chinthu payekha. Njira imeneyi kumathandiza kupeza kasinthasintha, womwe ena zosintha ndi mfundo zabwino, pamene ena - otsika zokwanira aliyense chinthu payekha.

njira ina kasinthasintha - kvartimaks, zimathandiza kupeza kasinthasintha zina, imene zinthu aliyense variable munthu kuti akatundu onse otsika ndi mkulu.

ekvimaks kasinthasintha njira ndi kukondera pakati pa njira ziwiri zafotokozedwa pamwambapa.

njira zonsezi orthogonal ndi nkhwangwa matanthauzo perpendicular, pa ntchito zawo unkagwiritsidwa palibe malumikizanidwe pakati pa zinthu payekha.