: Calculates mean, mode, sorting, skewness, and kurtosis using both the Folk and Ward (1957) graphical methods and moment methods .
Folk and Ward Method: Calculations for mean, sorting (standard deviation), skewness, and kurtosis.
What generated your raw numbers (physical sieves or a laser granulometer)? gradistat v 91 link
package in R, which was built as an evolution of the GRADISTAT macro. It provides similar descriptive statistics and can be accessed via a web-based interface for those unfamiliar with R coding. Official Links Software Homepage KPAL Gradistat Academic Reference Blott and Pye (2001) Paper into the Excel macro?
: Datasets and analysis examples using GRADISTAT v9.1 are often hosted on academic sharing platforms like Figshare . : Calculates mean, mode, sorting, skewness, and kurtosis
is a widely used Microsoft Excel-based program designed for the rapid analysis of grain size statistics from unconsolidated sediments. It was originally developed by Simon J. Blott and Kenneth Pye. Core Functionality
Developed originally by Simon Blott, GRADISTAT is a Microsoft Excel-based program designed to analyze grain size statistics. It automates the complex mathematical processes required to understand sediment distribution. Version 9.1 represents a refined iteration of this tool, offering compatibility with modern spreadsheet environments while maintaining the rigorous analytical standards required for peer-reviewed research. Key Features of GRADISTAT v9.1 package in R, which was built as an
Grain size analysis is a foundational method in geology, sedimentology, and geography. It helps researchers understand sediment transport, depositional environments, and soil mechanics. While laboratory methods like sieving or laser diffraction provide raw data, converting that data into meaningful statistics requires specialized software.
The software is a widely used Microsoft Excel-based program for grain size distribution and statistical analysis of unconsolidated sediments. It is primarily designed to handle data from standard measuring techniques like sieving and laser granulometry. Download and Access
Understanding the underlying statistical power of the software is key to appreciating its value.
: Calculates mean, mode, sorting, and skewness using both arithmetic/geometric (metric) and logarithmic (phi units) methods.