---
title: "Discussion on \"The Cost Function: How Wrong Are We, Exactly?\" | Hashnode"
description: "Discussion on \"The Cost Function: How Wrong Are We, Exactly?\". Learn how machine learning measures prediction errors using the cost function, with linear regression examples explained from scratch in Python."
url: "https://hashnode.com/posts/the-cost-function-how-wrong-are-we-exactly/6a7c97c7a1dfbf56f3734003"
---

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# [The Cost Function: How Wrong Are We, Exactly?](https://tharunpandya.hashnode.dev/the-cost-function-how-wrong-are-we-exactly?utm_source=hashnode&utm_medium=feed)

Learn how machine learning measures prediction errors using the cost function, with linear regression examples explained from scratch in Python.

Aug 12 · 8 min read · tharunpandya.hashnode.dev  
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-   [#linearregression](https://hashnode.com/tag/linearregression)
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-   [#python](https://hashnode.com/tag/python)

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[Tharun](https://hashnode.com/@tharun-pandya)

@tharun-pandya · Bangalore, India

  
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