https://github.com/xraypy/xraylarch

Larch: Applications and Python Library for Data Analysis of X-ray Absorption Spectroscopy (XAS, XANES, XAFS, EXAFS), X-ray Fluorescence (XRF) Spectroscopy and Imaging, and more.
https://github.com/xraypy/xraylarch

python synchrotron x-ray-absorption-fine-structure x-ray-fluorescence x-ray-physics

Last synced: 4 months ago
JSON representation

Larch: Applications and Python Library for Data Analysis of X-ray Absorption Spectroscopy (XAS, XANES, XAFS, EXAFS), X-ray Fluorescence (XRF) Spectroscopy and Imaging, and more.

• Host: GitHub
• URL: https://github.com/xraypy/xraylarch
• Owner: xraypy
• License: other
• Created: 2012-05-07T03:20:16.000Z (about 14 years ago)
• Default Branch: master
• Last Pushed: 2026-03-10T15:16:13.000Z (4 months ago)
• Last Synced: 2026-03-10T21:36:24.751Z (4 months ago)
• Topics: python, synchrotron, x-ray-absorption-fine-structure, x-ray-fluorescence, x-ray-physics
• Language: Python
• Homepage: https://xraypy.github.io/xraylarch
• Size: 187 MB
• Stars: 169
• Watchers: 20
• Forks: 81
• Open Issues: 60
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE

Awesome Lists containing this project

README

          
## Larch:  Data Analysis Tools for X-ray Spectroscopy and More

[![A](https://github.com/xraypy/xraylarch/actions/workflows/test-ubuntu.yml/badge.svg)](https://github.com/xraypy/xraylarch/actions/workflows/test-ubuntu.yml)

[![B](https://github.com/xraypy/xraylarch/actions/workflows/test-windows.yml/badge.svg)](https://github.com/xraypy/xraylarch/actions/workflows/test-windows.yml)

Larch is an open-source library and set of applications for

visualizing, processing, and analyzing X-ray absorption and

fluorescence spectroscopy data from synchrotron beamlines.  While its

origins and emphasis are in X-ray absorption fine-structure

spectroscopy (XAS), including X-ray absorption near-edge spectroscopy

(XANES) and extended X-ray absorption fine-structure spectroscopy

(EXAFS), it also supports visualization and analysis tools for several

related X-ray measurement modes.  These include X-ray fluorescence

(XRF) spectra and XRF and X-ray diffraction (XRD) images as collected

at scanning X-ray microprobe beamlines.

Larch is written in Python, and makes heavy use of the excellent

scientific Python libraries.  It can be used as a Python library, or

through one of several Graphical User Interfaces, including Larix, and

others listed in the table below.

Larch is distributed under the MIT licence.  It has been under active

and open development for more than a decade, and is built on XAFS

analysis tools that go back to the 1990s.  Development is done

primarily at the University of Chicago, with support from the US

National Science Foundation, and the US Departmen of Energy.

The best citable reference for Larch is https://doi.org/10.1088/1742-6596/430/1/012007

## Larch Applications

These applications installed with Larch, in addition to a basic Python

library. Here, GUI = Graphical User Interface, CLI = Command Line

Interface, and `beta` indicates a work in progress.

| Application Name  | GUI/CLI    | Description                                            |

| ----------------- |----------- | ------------------------------------------------------ |

| larch             | CLI        | simple shell command-line interface                    |

| Larch GUI         | GUI        | enhanced command-line interface with data browser      |

| Larix             | GUI        | XAFS Processing and Analysis: XANES pre-edge peak      |

|                   |            | fitting, linear analysis, PCA/LASSO, EXAFS processing  |

|                   |            | Running Feff, fitting EXAFS data to Feff paths.        |

| GSE Map Viewer    | GUI        | XRF Map Viewer for GSECARS X-ray microprobe data.      |

| larch_xrf         | GUI        | Display and analyze XRF Spectra.                       |

| larch_xrd1d       | GUI        | Display and work with 1-D XRD patterns, integrate XRD  |

|                   |            | images, search for XRD patterns of known structures    |

| feff6l            | CLI        | Feff 6 EXAFS calculations                              |

| feff8l            | CLI        | Feff 8 EXAFS calculations (no XANES)                   |

| qtrixs            | GUI `beta` | Display RIXS planes, take profiles                     |

In addition, the applications built with it also use a built-in

Python-like macro language for interactive and batch processing.  This

embedded "miniPython" language is intended to be very easy to use for

novices while also being complete enough to automate data processing

and analysis and to encourage and facilitate a gentle transition to

transition from GUI-only analyses to scripted and programmatic

analysis of larger data sets, and allows Larch to be run as a service,

interacting with other processes or languages via XML-RPC.