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Particle-Size Toolbox

The Particle-Size Toolbox (PST) is a numerical toolbox designed to robustly analyse spatial particle-size data.

How does it work?
  • Treating percentage-frequency data as compositions means that statistical analysis is best done using Aitchisons's log-ratio approach. This is a simple transformation that removes issues associated with the non-negative, constant-sum properties of particle-size distributions.

The PST has three main modules:
  • integrate   - convert and calibrate particle-size data from different sources into a single uniform format
  • analyse      - log-ratio analysis particle-size data 
  • interpolate  - spatial interpolation of particle-size data in n-dimensions

Go to the PST web-wiki to find out how to download and run the PST to analyse your data.

The latest release of the Particle-Size Toolbox can also be downloaded here.

Functions for plotting compositional data can be downloaded here. Note that these are still beta functions so may be buggy!

Please feel free to leave comments below. Questions can be directed to: