Data Science Articles

Matthew Urwin

Updated on August 05, 2025

Artificial intelligence has never been more accessible to everyday users, but that only increases the number of choices out there. Here’s an overview of the top AI models available, including GPT-4o, Claude 3.7 Sonnet and DeepSeek-R1.

Alex Zelinsky

Updated on August 04, 2025

A full binary tree is a tree where every node has either zero or two children, while a complete binary tree is a tree where all levels are fully filled except possibly the last (which is filled from left to right).

Michael Galarnyk

Updated on August 04, 2025

Train test split is a model validation procedure that splits a data set into a training set and a testing set, which are used to determine how your model performs on new data. Here’s how to apply it.

Soner Yıldırım

Updated on August 04, 2025

The dot product of a matrix refers to the matrix multiplication process, where the dot product is computed between rows of the first matrix and columns of the second matrix to produce a new matrix.

Sohail Hosseini

Updated on August 04, 2025

The .loc[] and .iloc[] properties in Pandas are used to access specific rows and columns in a pandas DataFrame (or slice a data set). The .loc[] property is used for label indexing, while the .iloc[] property is used for integer indexing.

David Klempfner

Updated on August 04, 2025

Two’s complement is a binary encoding method used to represent signed integers in computing systems.

Giorgos Myrianthous

Updated on August 01, 2025

A fact table contains quantitative data from a business process. Dimension tables store qualitative data that provide context for the facts. Together, they are the core components of the star schema used in data warehouse modeling.

Gianluca Malato

Updated on August 01, 2025

The Shapiro-Wilk test is a hypothesis test applied to a sample with the null hypothesis that the sample was generated from a normal distribution.

Alex Williams

Updated on August 01, 2025

A data governance framework is a series of regulations and role assignments that assure cooperation in a company’s data management.

Julia Zolotarev

Updated on August 01, 2025

A non-relational database (or NoSQL database) is a data storage system that allows flexible, schema-less organization of information using formats like documents, key-value pairs, graphs or wide-column structures.