Open Library
Free, bite-sized Data Science & Analytics lessons — clear explanations, worked examples, and interactive charts.
Control Flow
If-else statements, loops (for, while), break/continue
Explore lessons →Data Structures: Lists & Tuples
Creating, indexing, slicing, list comprehensions
Explore lessons →String Manipulation
String methods, formatting, regex basics
Explore lessons →Linear Algebra: Vectors
Vector operations, dot product, magnitude, unit vectors
Explore lessons →Linear Algebra: Matrices
Matrix operations, multiplication, transpose, inverse
Explore lessons →Linear Algebra: Eigenvalues
Eigenvalues, eigenvectors, and their applications
Explore lessons →Correlation & Covariance
Pearson, Spearman correlation, correlation vs causation
Explore lessons →Central Limit Theorem
CLT concept, applications, sample size
Explore lessons →Determinant of a Matrix
What the determinant of a matrix actually measures
Explore lessons →SQL Basics
SELECT, FROM, WHERE, ORDER BY, LIMIT
Explore lessons →Linear Regression
Simple linear regression, assumptions, interpretation
Explore lessons →Principal Component Analysis
Dimensionality reduction, variance explained
Explore lessons →Word Embeddings
Word2Vec, GloVe, embedding layers
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