---
name: "free_gpa"
section: "1"
platform: "linux"
package: "python3-freesas"
version: "2024.9.0-3"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/free_gpa"
---

# free\_gpa(1)

manual page for free\_gpa 2024.9.0

## NAME

free\_gpa - manual page for free\_gpa 2024.9.0

## DESCRIPTION

usage: free\_gpa \[OPTIONS\] FILES

Calculate the radius of gyration using Guinier Peak Analysis (Putnam 2016) for a set of scattering curves

### positional arguments:

- FILE

  dat files of the scattering curves

### options:

- **-h**, **--help**

  show this help message and exit

- **-v**, **--verbose**

  switch to verbose mode

- **-V**, **--version**

  show program's version number and exit

- **-o**, **--output** OUTPUT

  Output filename

- **-f**, **--format** FORMAT

  Output format: native, csv, ssf

- **-u**, **--unit** {nm,??,A}

  Unit for q: inverse nm or ??ngstrom?

free\_gpa is an open-source implementation of the autorg algorithm originately part of the ATSAS suite. As this tool used a different theory, some results may differ

## SEE ALSO

The full documentation for **free\_gpa** is maintained as a Texinfo manual.  If the **info** and **free\_gpa** programs are properly installed at your site, the command

-

  **info free\_gpa**

should give you access to the complete manual.