6 dépôts
Operations to swap or update existing values within a specific column.
Distinct from Column Value Extraction: Closest candidates focus on extraction or sentinel replacement; this is general-purpose value swapping in tabular data.
Explore 6 awesome GitHub repositories matching data & databases · Column Value Replacements. Refine with filters or upvote what's useful.
This project is an educational resource and a collection of instructional materials for performing data manipulation and statistical analysis using Python. It provides a comprehensive set of guides and code examples for using the Pandas, NumPy, and Matplotlib libraries to analyze structured data. The resource includes a dedicated guide for reshaping, cleaning, and aggregating tabular data and time series via Pandas, alongside a reference for high-performance vectorized operations and linear algebra using NumPy. It also features tutorials for creating publication-quality charts, distribution p
Swaps specified values across a dataset to standardize markers and labels.
This project is a comprehensive library of practical Python code examples and patterns. It provides a collection of scripts and snippets designed to demonstrate a wide range of programming tasks, from basic syntax to advanced implementation patterns. The repository focuses on several core domains, including the implementation of concurrency and multithreading examples, data analysis snippets for cleaning and manipulating tabular data, and various data visualization examples. It also covers automation scripts for file system management and a variety of general programming patterns. Additional
Transforms categorical data into numerical values by applying a mapping dictionary to a column.
Ibis is a portable Python dataframe library and multi-backend query engine that provides a unified interface for executing data transformations across diverse compute engines. It functions as a Python SQL expression compiler and dialect transpiler, allowing users to define data logic once and execute it across cloud warehouses, embedded databases, and distributed clusters without rewriting code. The project distinguishes itself through a database backend abstraction that decouples transformation logic from the underlying execution engine. It enables polyglot data workflows by mixing raw SQL s
Creates new columns from existing data or constant literal values.
Pinot is a distributed, columnar analytical database designed for high-concurrency, low-latency query processing. It functions as a real-time OLAP datastore, enabling interactive, user-facing analytics by ingesting and querying massive datasets from both streaming and batch sources. The system architecture relies on a centralized controller for cluster coordination and a distributed segment-based storage model to ensure horizontal scalability. The platform distinguishes itself through a hybrid ingestion pipeline that unifies real-time event streams and historical batch data into a single quer
Enables the definition of virtual fields using expressions to transform or calculate data values dynamically during query execution.
Ce projet est un framework de traitement de données tabulaires haute performance pour R, conçu pour gérer des jeux de données massifs avec efficacité mémoire et vitesse. Il fournit une structure de données améliorée qui utilise la sémantique de référence et la modification sur place pour effectuer des transformations complexes sans la surcharge de copies d'objets inutiles. La bibliothèque se distingue par ses optimisations architecturales de bas niveau, incluant le traitement parallèle multi-threadé, le tri basé sur radix et l'analyse de fichiers mappés en mémoire. En déchargeant les routines critiques de manipulation et d'agrégation de données vers du code C compilé, elle permet une exécution rapide des tâches qui seraient autrement coûteuses en calcul. Son moteur principal prend en charge des opérations relationnelles avancées, telles que les jointures non-équi, glissantes et à intervalles chevauchants, parallèlement à l'indexation secondaire automatique pour accélérer l'accès répété aux données. Au-delà de ses capacités de traitement principales, le projet offre une suite complète d'outils pour la gestion du cycle de vie des données. Cela inclut des utilitaires d'ingestion et de sérialisation à haute vitesse avec détection automatique de type, ainsi qu'un support spécialisé pour l'analyse de séries temporelles et l'agrégation multidimensionnelle. Le framework est conçu pour évoluer, permettant aux utilisateurs d'effectuer des opérations complexes de regroupement, de filtrage et de remodelage sur des jeux de données contenant des milliards de lignes tout en maintenant la stabilité et les performances du système.
Evaluates logical conditions to replace values within columns based on specified criteria.
DataFrame is a C++ tabular data library and manipulation engine designed for managing heterogeneous data in contiguous memory. It functions as a statistical analysis framework and time series analysis toolkit, providing the means to store, index, and transform multidimensional datasets. The project distinguishes itself through a high-performance execution model that utilizes column-major storage, SIMD-aligned memory allocation, and a thread-pool for parallel computations. It employs a visitor-based algorithm dispatch system and policy-driven transformations to decouple data processing logic f
Allows swapping existing values in a column or the index with new values.