Posted by AJ Welch. Cov ntaub ntawv raug cai rau pandas txhais tau tias cov neeg tsim khoom feem ntau yuav paub qhov tsis muaj nuj nqis li cov ntaub ntawv ploj lossis ploj hauv pandas. Tsis pub dhau pandas, a tus nqi ploj lawm is denoted by NaN.
NaN thiab NaT yog dab tsi hauv pandas?
NaN is a NumPy value. np. Na. NaT yog tus nqi Pandas. pd. NaT. Tsis muaj tus nqi vanilla Python.
NaN txhais li cas hauv Python?
Yuav kuaj xyuas seb tus nqi ib leeg yog NaN hauv python. … NaN sawv cev rau Tsis yog Tus lejthiab yog ib txoj hauv kev los sawv cev tus nqi uas ploj lawm hauv cov ntaub ntawv. Nws yog tus nqi tshwj xeeb floating-point thiab tsis tuaj yeem hloov mus rau lwm yam tshaj li ntab.
Pandas ua li cas nrog NaN?
fillna muaj nuj nqi ntawm Pandas yooj yim tuav qhov tseem ceeb uas tsis muajSiv cov fillna, qhov tseem ceeb uas ploj lawm tuaj yeem hloov tau los ntawm tus nqi tshwj xeeb lossis tus nqi tag nrho xws li txhais tau tias, nruab nrab. Tsis tas li ntawd, qhov tseem ceeb uas ploj lawm tuaj yeem hloov pauv nrog tus nqi ua ntej lossis tom qab nws uas yog qhov zoo nkauj zoo nkauj rau lub sijhawm-series datasets.
Kuv yuav qhia li cas yog NaN yog pandas?
Ntawm no yog 4 txoj hauv kev los txheeb xyuas NaN hauv Pandas DataFrame:
- (1) Tshawb xyuas NaN hauv ib kab DataFrame: df['koj lub npe kab'].isnull.values.any
- (2) suav cov NaN hauv ib kab DataFrame: df['koj lub npe kab'].isnull.sum
- (3) Tshawb xyuas NaN nyob rau hauv tag nrho DataFrame: df.isnull.values.any
