Gradistat V 91 Hot May 2026
is a widely used computer program designed for the rapid analysis of grain size statistics from unconsolidated sediments. Originally developed by Simon J. Blott and Kenneth Pye in 2001, it operates as a Microsoft Excel-based package
The program's longevity is largely due to its integration within the Microsoft Excel ecosystem . GRADISTAT software - Kenneth Pye Associates Ltd gradistat v 91 hot
Method of Moments
Gradistat V 9.1 calculates a comprehensive suite of grain size statistics using both and the Folk and Ward (1957) graphical methods . Statistical Parameter Methods Supported Average Size Arithmetic, Geometric (metric), Logarithmic (phi units) Sorting Standard Deviation (measures of uniformity) Skewness Measures of symmetry in distribution Kurtosis Peakness or flatness of the distribution curve Descriptive Terms is a widely used computer program designed for
Integrated Correction Factors
: Automatically applies statistical weights to samples flagged as "hot-dried" to correct for the potential loss of fine particles or contamination that occurs during high-heat pre-treatments. Steep Learning Curve Remains: If you are new
Statistical Output
: Calculates parameters arithmetically and geometrically (in microns) and logarithmically (using the phi scale).
Conclusion
- Steep Learning Curve Remains: If you are new to Gradistat, v 91 "Hot" does very little to welcome you. The UI is utilitarian and dense. There are no tooltips for the newer, complex functions, meaning you will likely need to keep a documentation tab open or rely on community forums to figure out specific commands.
- Aesthetic Datedness: While the engine under the hood is "hot," the interface feels distinctly "cold" and dated. It lacks the modern, clean aesthetic of contemporary software. It gets the job done, but it isn't pretty to look at.
- Occasional Instability: As with many "Hot" or rapid-release builds, there are minor bugs. I experienced a rare crash when attempting to export complex logs, though autosave prevented data loss. It’s stable 95% of the time, but that 5% keeps you on your toes.
