Handling Missing Values in Data Frame | Data Frame | Pandas | Pandas Tutorial

Опубликовано: 05 Октябрь 2024
на канале: Parag Dhawan

382

Handling missing values in a dataframe is an important step in data cleaning and analysis. Here are some common techniques to handle missing values in Python:

Drop missing values: You can drop the rows or columns that have missing values using the dropna() method. By default, dropna() drops any row that contains at least one missing value. You can also specify the axis parameter to drop columns instead of rows. For example:

Drop rows with missing values
df.dropna()

Drop columns with missing values
df.dropna(axis=1)
Fill missing values: You can fill missing values with a specific value or a calculated value. The fillna() method can be used to replace missing values with a specific value. For example:

Replace missing values with 0
df.fillna(0)

Replace missing values with the mean of the column
df.fillna(df.mean())
Interpolate missing values: You can interpolate missing values to fill in the gaps in a dataset. The interpolate() method uses linear interpolation to estimate missing values based on the values of neighboring rows or columns. For example:

Interpolate missing values in a column
df['column_name'].interpolate()
Impute missing values: You can use statistical methods to impute missing values. The SimpleImputer class from the sklearn.impute module can be used to replace missing values with a statistical measure like the mean, median, or mode. For example:

from sklearn.impute import SimpleImputer

Replace missing values with the mean
imputer = SimpleImputer(strategy='mean')
df_imputed = imputer.fit_transform(df)

These are some of the common techniques to handle missing values in a dataframe in Python. It's important to choose the appropriate method based on the nature of your data and the analysis you are trying to perform.

In these video we will cover
isnull function
isna function
notnull function
how to check missing values of data frame.
How to Replace NaN values with a Scalar Value
fillna function
how to drop missing values of data frame
dropna function
How to Drop Missing Values along the rows
How to drop Missing Values along the columns
Replacing missing values or generic values.
‪@ParagDhawan‬

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