Data Science Articles

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.

Artem Oppermann

Updated on August 01, 2025

Data silos are isolated collections of data within an organization that are not easily accessible by other teams or systems, hindering collaboration and unified data analysis.

Sara A. Metwalli

Updated on July 31, 2025

Data labeling is the process of annotating raw data with meaningful tags or classifications so machine learning models can learn to recognize patterns and make accurate predictions.

Edoardo Romani

Updated on July 31, 2025

Diagnostic analytics is the process of examining historical data to identify the root causes behind outcomes, trends or anomalies.

Artem Oppermann

Updated on July 31, 2025

Object-relational mapping (ORM) is a programming technique that lets developers use object-oriented code to interact with relational databases, by translating objects to and from database-compatible formats.