ᛃ talon

Dataframes for OCaml

Talon provides type-safe DataFrames for OCaml, built on Nx arrays. It is the Raven ecosystem's equivalent of pandas and Polars.

Features

  • Heterogeneous columns — mix strings, floats, integers, and booleans
  • Applicative Row operations — type-safe, composable row-wise computations
  • First-class null handling — explicit null masks for numeric columns, Option types for strings and bools
  • Vectorized aggregations — column-wise and row-wise reductions backed by Nx
  • CSV I/O — read and write CSV files with auto-detection
  • Built on Nx — columns are 1-D Nx tensors

Quick Start

open Talon

let () =
  let df = create [
    ("name", Col.string [|"Alice"; "Bob"; "Charlie"|]);
    ("age", Col.int32 [|25l; 30l; 35l|]);
    ("score", Col.float64 [|92.5; 87.3; 95.1|]);
  ] in
  print df

Shape: (3, 3) name age score Alice 25 92.5 Bob 30 87.3 Charlie 35 95.1

Next Steps