| Larch: Data Analysis Tools for X-ray Spectroscopy

# 4. Larch GUIs

Larch provides several Graphical User Interfaces for easier manipulating, viewing, and processing of data. Many of the GUI displays are inter-related, so that they can bring up the other windows for displaying, interacting, and processing data. The main GUIs for Larch are

> - GSE_Mapviewer: viewing XRF maps from X-ray microprobes.
> - XAS_Viewer: read and view XAS data, do simple normalization, and pre-edge peak fitting.
> - larch_gui: simple command-line + data browser for Larch.

More details and screenshots are shown in the following pages.

- 4.1. Basic Larch GUI
- 4.2. GSECARS Mapviewr
- 4.3. XASViewer
  - 4.3.1. Reading Data into XAS Viewer
  - 4.3.2. Common XAS Processing Dialogs
  - 4.3.3. Pre-edge subtraction and Normalization
  - 4.3.4. Pre-edge peak fitting
  - 4.3.5. Linear Combination Analysis
  - 4.3.6. Principal Component and Non-negative Factor Analysis
  - 4.3.7. EXAFS Processing: Background Subtraction
  - 4.3.8. EXAFS Processing: Fourier Transforms