numdiff ☆

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Description:
Putative files comparison tool

Type: Formula | Tracked Since: Dec 28, 2025

Links: Homepage | formulae.brew.sh

Category: Developer tools

Tags: cli comparison scientific text-processing

Install: brew install numdiff

About:
Numdiff is a command-line utility that compares two files containing floating-point numbers, ignoring formatting and whitespace differences. It allows users to specify an absolute or relative tolerance for comparisons, making it ideal for verifying numerical data output from scientific simulations or calculations.

Key Features:

Tolerance-based comparison for floating-point numbers
Supports both absolute (-a) and relative (-r) tolerance flags
Ignores whitespace and formatting differences
Command-line interface for scripting and automation

Use Cases:

Verifying the correctness of scientific simulation outputs
Comparing numerical data files generated on different architectures
Validating regression tests for numerical algorithms

Alternatives:

diff – Standard diff is strict about whitespace and formatting, and cannot handle floating-point tolerances.
cmp – cmp compares files byte-by-byte and is unsuitable for text-based numerical data.

Version History

Detected	Version	Rev	Change	Commit
Sep 16, 2025 3:57pm		0	VERSION_BUMP	b3df7fe1
Sep 12, 2024 11:47am		0	VERSION_BUMP	15a65539