GRADISTAT: A grain size distribution and statistics package for the analysis of unconsolidated sediments . Authors: Simon J. Blott and Kenneth Pye. Access Options:
| Problem | Likely Cause | Solution | | :--- | :--- | :--- | | | Missing references in VBA. | Open VBA editor (Alt+F11), go to Tools > References, uncheck "Missing:..." | | Macros don't run on Mac | Mac Excel lacks full VBA. | Use Windows virtual machine, or switch to sedimentology package in R. | | File is corrupted after download | Incomplete download or ZIP error. | Delete and re-download from a verified university source. | | Gradistat button does nothing | Macros still disabled. | Check Trust Center settings again. Restart Excel. | download gradistat
For users looking for more modern or R-based solutions, the G2Sd package on CRAN serves as a functional counterpart to GRADISTAT for statistical sediment analysis. GRADISTAT software - Kenneth Pye Associates Ltd GRADISTAT: A grain size distribution and statistics package
Available from Kenneth Pye Associates Ltd in formats for Excel 2000-2003 and Excel 2007-2010. Archival & Alternative Links: Version 8.0: Can be found hosted on Zenodo . Access Options: | Problem | Likely Cause |
It provides mean, mode, sorting (standard deviation), skewness, and kurtosis in both metric (microns) and phi (
However, future updates are unlikely. The original authors have moved on to commercial software (Gradistat v9.0 is a paid standalone program). For long-term research, you should eventually migrate to open-source alternatives. But for a student needing to download GradiStat for a lab report tonight—it is still the gold standard.