Missing Data -> '결측치'How to check if there is missing data?1.isna()2. isnull()Both of them show the none value(true), additionally, can also find the number of the missing value by using sum()Then I can delete the row that contains the none value by using dropna()If I want to delete the column itself, must use axis = 1Or I can replace it with another value by fillna(), () -> replacementI also c..
