Skill Topic · Cinematic

🧹 Data Cleaning & Preprocessing

Aliens School — AI Series #79 Hinglish mein Data Cleaning samjho! 🚀

Overview

🧹 Data Cleaning & Preprocessing — Quick Facts

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Z: 3 = OUTLIER! │

Topic 1

💡 Data Cleaning Kya Hai?

📊 ` ┌──────────────────────────────────────────────┐ │ "GARBAGE IN = GARBAGE OUT!" │ │ │ │…

Topic 2

📊 Data Problems

💾 ` ┌──────────────────────────────────────────────┐ │ 1. MISSING VALUES → NaN, null, blank…

Topic 3

🔧 1. Handling Missing Values

🗄️ ` ┌──────────────────────────────────────────────┐ │ 📊 Strategy 1: DELETE (row/column) │…

Topic 4

🔧 2. Handling Duplicates

📈 ` BEFORE: AFTER: ┌──────┬─────┬────────┐ ┌──────┬─────┬────────┐ │ Anil │ 25 │ 50000 │ │…

Topic 5

🔧 3. Handling Outliers

🔍 ` ┌──────────────────────────────────────────────┐ │ OUTLIER = data point jo baaki se…

Topic 6

🔧 4. Normalization & Standardization

📉 ` ┌──────────────────────────────────────────────┐ │ PROBLEM: Features different SCALES…

Topic 7

🔧 5. Encoding Categorical Data

🧮 ` ┌──────────────────────────────────────────────┐ │ ML models ko NUMBERS chahiye! │ │…

Topic 8

📊 Complete Preprocessing Pipeline

🌐 ` Raw Data │ ▼ ┌──────────────────┐ │ 1. Explore Data │ → Shape, types, stats, missing %…

Topic 9

💻 JavaScript Example

📊 `javascript // Complete Data Preprocessing Pipeline class DataPreprocessor { // 1. Handle…

Topic 10

❓ Quiz

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a) Mean imputation

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b) Median imputation ✅

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c) Delete row

🎯

a) Numeric data ke liye

Quick Quiz

Quiz — Question 1

🧹 Data Cleaning & Preprocessing ka sabse sahi definition kya hai?

Complete! 🎉

🧹 Data Cleaning & Preprocessing Complete!

Aliens School · HIEN · Cinematic Knowledge

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