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pandas-data-wrangling

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Data cleaning, transformation, and exploratory analysis with pandas

skills/analysis/wrangling/pandas-data-wrangling/SKILL.md

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# Pandas Data Wrangling Guide

## Overview

Data wrangling -- the process of cleaning, transforming, and preparing raw data for analysis -- typically consumes 60-80% of a data scientist's time. Pandas is the de facto standard library for tabular data manipulation in Python, and mastering its idioms directly translates to faster, more reliable research workflows.

This guide covers the essential pandas operations that researchers encounter daily: loading heterogeneous data sources, diagnosing data quality issues, handling missing values, reshaping data for analysis, and performing exploratory data analysis (EDA). Each section includes copy-paste code examples designed for real-world research datasets.

Whether you are cleaning survey responses, preprocessing experimental logs, merging datasets from multiple sources, or preparing features for machine learning, the patterns here will save hours of trial and error.

## Loading and Inspecting Data

### Reading Common Formats
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