vaex

Process and visualize tabular datasets larger than RAM with lazy evaluation.

557|98|Updated Nov 7, 2025
One-click install
npx skills add https://github.com/jimmc414/Kosmos --skill vaex-jimmc414
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: vaex
Source: https://github.com/jimmc414/Kosmos/tree/main/kosmos-claude-scientific-skills/scientific-skills/vaex
Command: npx skills add https://github.com/jimmc414/Kosmos --skill vaex-jimmc414

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill tackles the challenge of processing and analyzing tabular datasets that are too large to fit into your computer's RAM, enabling interactive exploration and analysis on billions of rows.

Core Features & Use Cases

  • Out-of-Core Processing: Works with datasets larger than RAM (gigabytes to terabytes).
  • Fast Aggregations & Visualizations: Performs rapid statistical calculations and creates visualizations on massive data.
  • Lazy Evaluation: Operations are executed only when needed, optimizing performance.
  • Use Case: Analyze a multi-terabyte CSV file containing astronomical data, perform fast statistical aggregations, and generate interactive heatmaps without running out of memory.

Quick Start

Use the vaex skill to open the file 'large_dataset.hdf5' and calculate the mean of the 'value' column.

Frequently Asked Questions about vaex

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I process large tabular datasets that exceed available RAM?

Out-of-core processing handles large tabular datasets exceeding available RAM by using lazy evaluation to analyze gigabytes to terabytes of data without loading everything into memory. This enables interactive exploration on billions of rows.

What is the best way to perform fast aggregations on big data?

Fast aggregations on big data are achieved through lazy evaluation, executing operations only when needed to optimize performance. This approach handles billions of rows per second for rapid statistical calculations and memory-efficient data manipulation.

Can I visualize massive tabular datasets interactively without running out of memory?

Yes, interactive visualization of massive tabular datasets is possible without running out of memory. It applies out-of-core processing and lazy evaluation to generate visual representations like heatmaps on big data efficiently.

Does lazy evaluation help with large-scale statistical computation?

Lazy evaluation significantly helps large-scale statistical computation by delaying operations until explicitly needed. This optimizes performance and enables fast aggregations on massive tabular datasets that exceed available RAM.

How do I analyze a multi-terabyte CSV file for statistical aggregations?

Analyzing a multi-terabyte CSV file involves out-of-core processing to handle datasets larger than RAM. You can perform fast statistical aggregations and generate visualizations efficiently through memory-efficient data manipulation and lazy evaluation.

When do I need out-of-core processing for tabular data?

Out-of-core processing for tabular data is needed when your dataset size exceeds available RAM, typically ranging from gigabytes to terabytes. It allows interactive exploration and analysis on billions of rows without memory errors.