Page de couverture de ML-UL-EP7-t-SNE (t-distributed Stochastic Neighbor Embedding) - [ENGLISH]

ML-UL-EP7-t-SNE (t-distributed Stochastic Neighbor Embedding) - [ENGLISH]

ML-UL-EP7-t-SNE (t-distributed Stochastic Neighbor Embedding) - [ENGLISH]

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 Episode Description: Welcome to another engaging episode of Pal Talk – Machine Learning, where complex algorithms are decoded into stories and strategies you can actually use. Today, we dive into one of the most visually stunning and conceptually powerful techniques in the realm of high-dimensional data: t-SNE – t-distributed Stochastic Neighbor Embedding. If you've ever seen those mesmerizing 2D or 3D plots where thousands of datapoints seem to organize themselves into meaningful clusters — there's a good chance t-SNE was behind it. But what is t-SNE really doing? Why is it such a favorite for visualizing high-dimensional data like images, word embeddings, or gene expressions? 🎯 In this episode, we unravel: ✅ What is t-SNE? t-SNE is a non-linear dimensionality reduction technique that transforms high-dimensional data into a low-dimensional space — typically 2D or 3D — while preserving local structure. It excels at revealing clusters, patterns, and relationships that linear methods like PCA often miss. ✅ Why Use t-SNE? Perfect for visualizing complex datasets Great for exploring clusters in unsupervised learning Helps understand embeddings like those from word2vec, BERT, or autoencoders Powerful in bioinformatics, NLP, and image recognition ✅ How Does It Work – Intuitively Explained: We avoid the deep math and focus on intuition: Converts distances between points into probabilities (how likely one point is a neighbor of another) Matches these probabilities in the low-dimensional space Minimizes the Kullback-Leibler divergence between the two distributions Uses a Student-t distribution to prevent crowding in 2D/3D space ✅ The Beauty and the Quirks of t-SNE: It’s amazing for visualization, but not for general-purpose feature reduction Results can vary with perplexity, learning rate, and random seeds Doesn’t preserve global structure well — but that’s often not the goal ✅ Step-by-Step with Python (Scikit-learn): We walk through how to run TSNE() on a dataset, explain key parameters like: perplexity (typically between 5 and 50) n_iter (number of optimization steps) init='pca' vs 'random' n_components=2 or 3 ✅ Visualizing the Output: We discuss how to read a t-SNE plot — where distances between points represent similarity, and clusters indicate potential groups, classes, or features. ✅ Use Cases Across Domains: Digit recognition (MNIST dataset) Protein structure and genomics Customer segmentation NLP embeddings Preprocessing for clustering 👥 Hosted By: 🎙️ Speaker 1 (Male) – A data visualization enthusiast who brings algorithms to life with stories and graphs 🎙️ Speaker 2 (Female) – A curious learner exploring the power of intuition in machine learning 📌 Highlights from This Episode: When and why to use t-SNE instead of PCA Tips for tuning t-SNE parameters Common pitfalls and how to avoid them Comparing t-SNE with UMAP – another nonlinear method gaining popularity 🎓 Whether you're a researcher, data analyst, or just curious about how machines see complex data, this episode will equip you with the intuition to use t-SNE confidently and wisely. 📌 Coming Up Next on Pal Talk – Machine Learning: UMAP vs. t-SNE: Battle of the Visualizers Clustering After Dimensionality Reduction Understanding Embeddings in Deep Learning Real-time t-SNE for Interactive Dashboards 🔔 Subscribe, share, and rate to support the show. Let’s continue unfolding the magic of machine learning — one insight at a time. 🎨 Pal Talk – Let’s Make Data Talk with Colors and Clusters.
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