: Including X-ray sedigraph and Coulter counters.
The methods utilized (Folk and Ward) are industry standards, ensuring your results are comparable with international studies.
: For each sample, GradiStat automatically calculates the mean , mode , sorting , skewness , and kurtosis . These descriptive terms help characterize the nature of the sediment.
If you want, I can:
The program will generate a new sheet with results, classification, and histograms. Limitations
is another open-source and easy-to-use software designed for the comprehensive analysis of grain-size distributions. It implements many useful functions and aims to provide a complete analysis platform, all within a user-friendly package.
Click the "Calculate" button to populate the results sheets automatically. System Requirements To run Gradistat v 9.1 smoothly, you simply need: gradistat v 91 free
The program takes raw data—such as sieve weights or laser granulometer volume percentages—and automatically calculates key sedimentological parameters. These include mean, sorting, skewness, and kurtosis, utilizing both the and the method of moments . Key Features of GRADISTAT v9.1
While Gradistat V 9.1 is a commercial software, there are several avenues to access it for free:
| Software | Platform | Key Strengths | Grade for GradiStat Users | | :--- | :--- | :--- | :--- | | | R (with a web interface) | An evolution of GradiStat v4.0. Performs all the same statistics plus more. Highly active development. Has a user-friendly web-based GUI. | Excellent | | QGrain | Python (standalone) | A comprehensive platform for GSD analysis. Includes traditional tools and advanced algorithms like End-Member Modeling Analysis (EMMA) and Single-Sample Unmixing (SSU). | Very Good | | GrainSizeTools | Python (script) | Cross-platform, open-source. Focuses on grain size population characterization and 3D stereology for 2D section data. | Good | : Including X-ray sedigraph and Coulter counters
Perhaps the most direct evolution of GRADISTAT, is an R package that provides comprehensive descriptive statistics and physical descriptions of sediment based on grain-size distribution data. It is the modern, open-source successor that builds upon the same principles. G2Sd also includes a powerful Shiny web application for an intuitive graphical interface, making it accessible even to those new to R programming.
Calculated in metric units (micrometers/millimeters). Geometric Method of Moments: Calculated in metric units.
It’s a spreadsheet-based tool (developed by Simon Blott) that calculates standard grain size statistics using the method of moments and the Folk and Ward method. It saves hours of work by automatically generating cumulative curves and statistical outputs. These descriptive terms help characterize the nature of
: Classifies samples based on standard geological scales, such as the Folk and Ward method or the Wentworth scale.