package talon

  1. Overview
  2. Docs
A dataframe library for OCaml

Install 

dune-project
 Dependency

github.com Readme Changelog Edit opam file Versions (2)

Authors

  1. Thibaut Mattio

Maintainers

  1. Thibaut Mattio

Sources

raven-1.0.0.alpha2.tbz
sha256=93abc49d075a1754442ccf495645bc4fdc83e4c66391ec8aca8fa15d2b4f44d2
sha512=5eb958c51f30ae46abded4c96f48d1825f79c7ce03f975f9a6237cdfed0d62c0b4a0774296694def391573d849d1f869919c49008acffca95946b818ad325f6f

doc/talon.csv/Talon_csv/index.html

Module Talon_csvSource

CSV I/O operations for Talon dataframes

Sourceval read : ?sep:char -> ?header:bool -> ?na_values:string list -> ?dtype_spec: (string * [ `Float32 | `Float64 | `Int32 | `Int64 | `Bool | `String ]) list -> string -> Talon.t

read ?sep ?header ?na_values ?dtype_spec file reads CSV file.

  • sep: delimiter (default ',')
  • header: first row contains column names (default true)
  • na_values: strings to interpret as null (default "", "NA", "N/A", "null", "NULL")
  • dtype_spec: column types (auto-detected if not provided)

Null handling:

  • Empty strings and na_values become None for strings, NaN for floats
  • Invalid numeric values become NaN/None
  • Auto-detection treats columns with nulls as nullable
Sourceval write : ?sep:char -> ?header:bool -> ?na_repr:string -> Talon.t -> string -> unit

write ?sep ?header ?na_repr df file writes to CSV.

  • sep: delimiter (default ',')
  • header: write column names as first row (default true)
  • na_repr: string representation of nulls (default "")

Null values are written as na_repr (empty string by default).

Sourceval to_string : ?sep:char -> ?header:bool -> ?na_repr:string -> Talon.t -> string

to_string ?sep ?header ?na_repr df converts dataframe to CSV string.

Sourceval from_string : ?sep:char -> ?header:bool -> ?na_values:string list -> ?dtype_spec: (string * [ `Float32 | `Float64 | `Int32 | `Int64 | `Bool | `String ]) list -> string -> Talon.t

from_string ?sep ?header ?na_values ?dtype_spec csv_string parses CSV string.