Video: Yuav ua li cas ua ke Panda cov ntaub ntawv thav ntawv?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Koom nrog cov no DataFrames , pandas muab ntau yam haujlwm zoo li concat(), ua ke (), koom (), thiab lwm yam. Hauv seem no, koj yuav xyaum siv ua ke () ua haujlwm ntawm pandas . Koj tuaj yeem pom tias qhov DataFrames yog tam sim no ua ke hauv ib leeg DataFrame raws li qhov tseem ceeb muaj nyob hauv kab ntawv id ntawm ob qho tib si DataFrames.
Ua raws li qhov no saib, koj ua li cas muab cov ntaub ntawv thav ntawv?
Qhia qhov koom ntaus hauv "yuav ua li cas" hais kom ua. Ib sab laug koom , los yog sab laug ua ke , khaws txhua kab ntawm sab laug dataframe . Los ntawm sab laug- koom los yog sab laug- ua ke ntawm ob dataframes hauv Pandas. Kab sab laug dataframe uas tsis muaj kev sib raug zoo koom tus nqi nyob rau hauv txoj cai dataframe tshuav nrog NaN nqi.
Tsis tas li ntawd, kuv yuav ua li cas ntxiv Dataframe rau lwm Dataframe hauv Python? Pandas dataframe . ntxiv () muaj nuj nqi yog siv rau ntxiv kab ntawm lwm yam dataframe mus rau qhov kawg ntawm qhov muab dataframe , rov los tshiab dataframe khoom. Kum tsis nyob hauv qhov qub dataframes tau ntxiv raws li cov kab tshiab thiab cov hlwb tshiab tau populated nrog NaN tus nqi. ignore_index: Yog tias muaj tseeb, tsis txhob siv cov ntawv cim npe.
Khaws qhov no hauv kev xav, qhov txawv ntawm kev sib koom ua ke thiab koom nrog pandas yog dab tsi?
DataFrame. koom () txoj kev ua ib txoj hauv kev yooj yim rau kev nkag mus rau lub peev xwm ntawm pandas . koom (df2) ib txwm koom ntawm qhov ntsuas ntawm df2, tab sis df1. ua ke (df2) ua koom rau ib lossis ntau kab ntawm df2 (default) lossis rau qhov ntsuas ntawm df2 (nrog right_index=True).
NaN yog panda?
Mus ntes NaN tus nqi pandas siv ib qho. isna() lub. tsis yog (). Cov NaN qhov tseem ceeb tau txais los ntawm qhov tseeb tias pandas yog tsim nyob rau sab saum toj ntawm numpy, thaum ob lub luag haujlwm 'lub npe pib los ntawm R's DataFrames, nws cov qauv thiab kev ua haujlwm. pandas sim ua kom yuam kev.
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