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Python - Learning Basic of Pandas
Data Cleaning: Hands-on Pandas for Beginners 🐼
Pandas is the second popular Python library in Data Science (55%, Statista).
Here are most useful data cleaning functions in Pandas:
✅ Handling Missing Values:
↪ fillna(): Fills missing values with a specified value
↪ dropna(): Drops rows or columns with missing values
↪ interpolate(): Fills missing values using interpolation methods
✅ Data Type Conversion and Cleaning:
↪ astype(): Converts data types of columns
↪ to_numeric(): Converts strings to numeric data types
↪ applymap(): Applies a function for cleaning individual values.
✅ String Manipulation and Cleaning:
↪ str.strip(): Removes whitespaces from strings in a column.
↪ str.lower(): Converts all characters in a string to lowercase.
↪ str.replace(): Replaces specific characters in strings with desired values.
✅ Data Exploration and Outlier Detection:
↪ boxplot(): Visualizes the distribution of data
↪ IQR(): Calculates the Interquartile Range using quantiles.
↪ describe(): Generates summary statistics for numerical columns
✅ Data Aggregation and Transformation:
↪ groupby(): Groups data by specific columns
↪ resample(): Resamples time series data at different frequencies
↪ pivot_table(): Summarizes data with various aggregation functions
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