Maintained by Marco A. Lopez-Sanchez - This website was last modified: 2022/02/03
GrainSizeTools is a free, open-source, cross-platform script written in Python that provides tools for (1) describing and visualizing grain size populations, (2) estimating differential stress for different mineral phases via paleopizometers and (3) apply stereology methods to approximate the actual distribution (3D) of grain size from sections. The script does not require previous experience with the Python programming language (see the documentation below and FAQ). For users with coding skills, the script is organized in a modular (functional) way facilitating the reuse and code extension.
Latest release: v3.0.2
Date: 2020/12/31
See notes at https://github.com/marcoalopez/GrainSizeTools/releases/tag/v3.0.2
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Import and manipulate tabular-like datasets including txt, csv, or excel formats.
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Full automatic descriptive statistics of grain size populations including:
- Several averages (arithmetic and geometric means, median, and frequency peak ("mode") via Gaussian Kernel Density Estimator)
- Estimation of robust confidence intervals (including some specific methods for lognormal populations such as the modified Cox or the GCI method)
- Measures of dispersion and shape of the population
- Normality and lognormality test
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Estimate differential stress using paleopiezometers. It includes multiple piezometric relations for quartz, olivine, calcite, and feldspar (others planned!)
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Ready-to-publish plots in bitmap or vector format (see screenshots below), including:
- Histograms and kernel density estimates
- Area- or volume-weighted plots
- Normalized plots
- Quantile-quantile plots, and more
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Stereology methods (approximate the actual 3D grain size distribution from data collected in plane sections):
- Saltykov method
- Two-step method (lognormal fitting, shape characterization)
You can download the script at the following sites:
https://github.com/marcoalopez/GrainSizeTools/releases (primary source)
http://figshare.com/articles/GrainSizeTools_script/1383130
https://sourceforge.net/projects/grainsizetools/
- FAQs
- Getting started: first steps using the GrainSizeTools script
- Describing the population of grain sizes
- The plot module: visualizing grain size distributions
- The paleopiezometry module
- The stereology module
Others
Script reference
Lopez-Sanchez, Marco A. (2018). GrainSizeTools: a Python script for grain size analysis and paleopiezometry based on grain size. Journal of Open Source Software, 3(30), 863, https://doi.org/10.21105/joss.00863
GrainSizeTools script is licensed under the Apache License, Version 2.0 (the "License")
The documentation of GrainSizeTools script is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License (CC BY-NC-SA 4.0).
The GitHub website hosting the project provides several options (you will need a GitHub account, it’s free!):
- Open a discussion: This is a place to:
- Ask questions you are wondering about.
- Share ideas.
- Engage with the developers (still just me).
- Open and issue: This is a place to track bugs or requests for specific features on the scripts.
- Create a pull request: You modified, corrected or added a feature to one of the notebooks and send it for one of the developers to review it and add it to the main page.
For a quick explanation see https://www.youtube.com/watch?v=R8OAwrcMlRw.
Copyright © 2021 Marco A. Lopez-Sanchez
Information presented on this website and the documentation of the script is provided without any express or implied warranty and may include technical inaccuracies or typing errors; the author reserve the right to modify or enhance the content of this website as well as the documentation of the script at any time without previous notice. This webpage and the documentation is not liable for the content of external links.
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