--- title: "#regression articles | Hashnode" description: "Explore 166 articles tagged #regression on Hashnode. Tutorials, guides, and how-tos from the community." url: "https://hashnode.com/tag/regression" --- Tag # #regression 166 posts · 9 followers [Powerduck](https://hashnode.com/@powerduck) · [Nov 1](https://hashnode.com/posts/manual-repro-proved-once-no-regression-test/6ae686bd25e493162f953de7) ### [A Fix Proved Once in a Terminal Is Still Just a Hope](https://blogs.powerduck.com/manual-repro-proved-once-no-regression-test?utm_source=hashnode&utm_medium=feed) You run the failing command by hand, watch it pass, declare done, and merge. Three months later the same path breaks because nobody turned that manual repro into a test that stays in the suite. 4 min read · [blogs.powerduck.com](https://blogs.powerduck.com/manual-repro-proved-once-no-regression-test?utm_source=hashnode&utm_medium=feed) [MainStay Marketing](https://hashnode.com/@mainstaypeopleconsul) · [Sep 17](https://hashnode.com/posts/writing-automated-regression-testing-frameworks-for-statutory-payroll-formulas/6aabdaa838e265d3520f06f0) ### [Writing Automated Regression Testing Frameworks for Statutory Payroll Formulas](https://mainstay.hashnode.dev/writing-automated-regression-testing-frameworks-for-statutory-payroll-formulas?utm_source=hashnode&utm_medium=feed) In enterprise payroll management, statutory wage calculations are constantly shifting targets. Regulatory authorities routinely update state-specific Professional Tax (PT) slabs 3 min read · [mainstay.hashnode.dev](https://mainstay.hashnode.dev/writing-automated-regression-testing-frameworks-for-statutory-payroll-formulas?utm_source=hashnode&utm_medium=feed) [Tharun](https://hashnode.com/@tharun-pandya) · [Aug 31](https://hashnode.com/posts/from-lines-to-decisions-why-regression-fails-at-classification/6a95d4e6626ac941e43dfc2f) ### [From Lines to Decisions: Why Regression Fails at Classification](https://tharunpandya.hashnode.dev/from-lines-to-decisions-why-regression-fails-at-classification?utm_source=hashnode&utm_medium=feed) Learn why linear regression fails at classification, how predictions can go below 0 or above 1, and why sigmoid is needed for probabilities. 9 min read · [tharunpandya.hashnode.dev](https://tharunpandya.hashnode.dev/from-lines-to-decisions-why-regression-fails-at-classification?utm_source=hashnode&utm_medium=feed) [Tharun](https://hashnode.com/@tharun-pandya) · [Aug 22](https://hashnode.com/posts/polynomial-regression-teaching-a-line-to-bend/6a8a080dea390438fc5306b1) ### [Polynomial Regression: Teaching a Line to Bend](https://tharunpandya.hashnode.dev/polynomial-regression-teaching-a-line-to-bend?utm_source=hashnode&utm_medium=feed) Learn polynomial regression from scratch using a delivery-time example, x^2, feature engineering, and gradient descent to fit curved patterns. 10 min read · [tharunpandya.hashnode.dev](https://tharunpandya.hashnode.dev/polynomial-regression-teaching-a-line-to-bend?utm_source=hashnode&utm_medium=feed) [Akash](https://hashnode.com/@irsakash) · [Aug 5](https://hashnode.com/posts/building-ml-models-from-data-to-deployment/6a736df7c41a5ed6cb4abd3b) ### [Building Production-Ready ML Models: From Data to Deployment](https://akashbuilds.hashnode.dev/building-ml-models-from-data-to-deployment?utm_source=hashnode&utm_medium=feed) Master ML workflows with real-world projects. Learn preprocessing, training, evaluation, and deployment using Python & scikit-learn. 12 min read · [akashbuilds.hashnode.dev](https://akashbuilds.hashnode.dev/building-ml-models-from-data-to-deployment?utm_source=hashnode&utm_medium=feed) [Sahil Khurana](https://hashnode.com/@sahildev775) · [Jul 22](https://hashnode.com/posts/the-complete-guide-to-regression-testing/6a604ddeda4294903f9b05f8) ### [The Complete Guide to Regression Testing](https://innostaxengineering.hashnode.dev/the-complete-guide-to-regression-testing?utm_source=hashnode&utm_medium=feed) Learn everything about regression testing, including its importance, types, tools, and best practices for maintaining software quality and stability. 8 min read · [innostaxengineering.hashnode.dev](https://innostaxengineering.hashnode.dev/the-complete-guide-to-regression-testing?utm_source=hashnode&utm_medium=feed) [Rudrendu Paul](https://hashnode.com/@rudrendupaul) · [Jul 15](https://hashnode.com/posts/regression-models-for-causal-inference-on-ai-features/6a57a65ae479ecc16ad3b5b5) ### [Product Experimentation with Regression-Based Causal Inference: Estimating LLM Feature Impact with Python and statsmodels](https://freecodecamp.org/news/regression-models-for-causal-inference-on-ai-features?utm_source=hashnode&utm_medium=feed) A randomized A/B test is the cleanest form of product experiment available. The coin flip that splits users between the new prompt template and the control removes every possible confounder by constru 20 min read · [freecodecamp.org](https://freecodecamp.org/news/regression-models-for-causal-inference-on-ai-features?utm_source=hashnode&utm_medium=feed) [Simon](https://hashnode.com/@simon1729) · [Jul 4](https://hashnode.com/posts/building-decision-trees-with-pandas-and-scikit-learn/6a4958d017232669dde104e6) ### [Building Decision Trees with Pandas and Scikit-learn](https://my-ai-learning-plan.hashnode.dev/building-decision-trees-with-pandas-and-scikit-learn?utm_source=hashnode&utm_medium=feed) The mathematics behind the Decision Tree Regressor Model 7 min read · [my-ai-learning-plan.hashnode.dev](https://my-ai-learning-plan.hashnode.dev/building-decision-trees-with-pandas-and-scikit-learn?utm_source=hashnode&utm_medium=feed) [Stat Hacks](https://hashnode.com/@stathacks) · [Jun 16](https://hashnode.com/posts/level-2-predictors-in-multi-level-modelling/6a3151a197651a883519d96e) ### [Level 2 Predictors in Multi Level Modelling](https://advanced-data-professionals.hashnode.dev/level-2-predictors-in-multi-level-modelling?utm_source=hashnode&utm_medium=feed) Note: this post is part of a series of posts regarding my comprehensive guide to Multi Level Modelling What are Level 2 Predictors? As the name implies - these factors vary at Level 2 - instead of Lev 9 min read · [advanced-data-professionals.hashnode.dev](https://advanced-data-professionals.hashnode.dev/level-2-predictors-in-multi-level-modelling?utm_source=hashnode&utm_medium=feed) [Anik Chand](https://hashnode.com/@anikchand461) · [May 23](https://hashnode.com/posts/8-linear-regression/6a11eba81a3cf7bffc43a651) ### [#8 Linear Regression](https://anikchandml.hashnode.dev/8-linear-regression?utm_source=hashnode&utm_medium=feed) Linear Regression is a supervised machine learning algorithm used for predicting continuous numerical values. It finds the relationship between input variables and output variables using a straight li 4 min read · [anikchandml.hashnode.dev](https://anikchandml.hashnode.dev/8-linear-regression?utm_source=hashnode&utm_medium=feed)