---
title: "Discussion on \"Episode 13: \nPhase 2: The Preprocessing Pipeline\" | Hashnode"
description: "Discussion on \"Episode 13: \nPhase 2: The Preprocessing Pipeline\". Act 1 — The Problem With Raw Data\nRaw data is a mess.\nStrings where there should be numbers. Categories with three possible values mixed alongside categories with seven. Numerical features on complete"
url: "https://hashnode.com/posts/episode-13-phase-2-the-preprocessing-pipeline/69ee01033d6a492cddf7154e"
---

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# [Episode 13: Phase 2: The Preprocessing Pipeline](https://adityand.hashnode.dev/episode-13-phase-2-the-preprocessing-pipeline?utm_source=hashnode&utm_medium=feed)

Act 1 — The Problem With Raw Data Raw data is a mess. Strings where there should be numbers. Categories with three possible values mixed alongside categories with seven. Numerical features on complete

Apr 26 · 3 min read · adityand.hashnode.dev  
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## Written by

[Aditya Dandia](https://hashnode.com/@adityand)

@adityand · Bengaluru, India

  
[View profile](https://hashnode.com/@adityand)

ML engineer in progress. Building from scratch.

A learner building ML algorithms from scratch to actually understand what's happening under the hood. Writing about the math, the mistakes, and the process and not just the results.

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