A fast, safe, and intuitive DataFrame library.

A fast, safe, and intuitive DataFrame library for exploratory data analysis.

User guide | Discord

DataFrame

A fast, safe, and intuitive DataFrame library.

Why use this DataFrame library?

• Encourages concise, declarative, and composable data pipelines.
• Static typing makes code easier to reason about and catches many bugs at compile time—before your code ever runs.
• Delivers high performance thanks to Haskell’s optimizing compiler and efficient memory model.
• Designed for interactivity: expressive syntax, helpful error messages, and sensible defaults.
• Works seamlessly in both command-line and notebook environments—great for exploration and scripting alike.

Features

• Type-safe column operations with compile-time guarantees
• Familiar, approachable API designed to feel easy coming from other languages.
• Interactive REPL for data exploration and plotting.

Quick start

Browse through some examples in binder or in our playground.

Install

See the Quick Start guide for setup and installation instructions.

Example

dataframe> df = D.fromNamedColumns [("product_id", D.fromList [1,1,2,2,3,3]), ("sales", D.fromList [100,120,50,20,40,30])]
dataframe> df
------------------
product_id | sales
-----------|------
   Int     |  Int 
-----------|------
1          | 100  
1          | 120  
2          | 50   
2          | 20   
3          | 40   
3          | 30   

dataframe> :declareColumns df
"product_id :: Expr Int"
"sales :: Expr Int"
dataframe> df |> D.groupBy [F.name product_id] |> D.aggregate [F.sum sales `as` "total_sales"]
------------------------
product_id | total_sales
-----------|------------
   Int     |     Int    
-----------|------------
1          | 220        
2          | 70         
3          | 70         

Documentation

• 📚 User guide: https://dataframe.readthedocs.io/en/latest/
• 📖 API reference: https://hackage.haskell.org/package/dataframe/docs/DataFrame.html.