: Statistics (mean, mode, sorting, skewness, kurtosis) are calculated arithmetically/geometrically in metric units and logarithmically in phi units.
: Accepts weight retained on sieves or percentage sediment detected by laser granulometers. Graphical Output
Let me know which one applies, and I’ll provide safe, legal resources. gradistat v 91 free
Before running the program, organize your physical laboratory data into the correct format. Sieve Data Input
: For users preferring R over Excel, this package is an evolution of the earlier GRADISTAT v4.0 macro. Kenneth Pye Associates Ltd Core Functionality : Statistics (mean, mode, sorting, skewness, kurtosis) are
). This is critical for characterizing poorly sorted or highly skewed natural environments, such as riverbeds, sand dunes, and glacial tills. Calculated Statistics at a Glance
The software is traditionally available for free through university or research organization websites. While the user mentioned "v 9.1," public releases historically include: Kenneth Pye Associates Ltd Version 8.0 This is critical for characterizing poorly sorted or
You can download the free software directly from the developers: Kenneth Pye Associates Ltd - GRADISTAT page Kenneth Pye Associates Ltd - Publications page (Look for the "Particle Size Analysis" section). 4. How It Works
The original paper detailing the software is: Blott, S.J. and Pye, K. (2001) "GRADISTAT: a grain size distribution and statistics package for the analysis of unconsolidated sediments", Earth Surface Processes and Landforms, 26, 1237-1248. ResearchGate
Mean, mode, sorting (standard deviation), skewness, and kurtosis.
: Calculates granular trends using both the traditional Method of Moments and the highly robust, graphically-rooted Folk and Ward (1957) mathematical models .
