Signal and Sense

Applied AI, statistics and high-dimensional data. Notes and projects by Ravindra Kumar Pathak. I work on AI products in education and write about applied machine learning, statistics and high-dimensional data. This site holds my project write-ups and learning notes.

Featured projects

• MarketingPlanned

  Customer segmentation from retail transactions

  Group customers into actionable segments using PCA and clustering.

• IndustryPlanned

  Fault detection from semiconductor sensors

  Flag faulty production runs from about 590 sensors with very few failures.

• FinancePlanned

  Portfolio construction with covariance shrinkage

  Compare raw and shrunk covariance estimates in an out-of-sample backtest.

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Latest writing

• Starting this site: six projects in high-dimensional data

  5 October 2026. What I plan to build, why, and how I will document it.

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