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91 Free _verified_ | Gradistat V

Gradistat V91 — Free Download and Overview

Step 3: Enter Your Data

  • Go to the Input sheet.
  • Paste your sieve intervals (starting with the largest mesh) and corresponding weights.
  • Ensure total dry weight is correct at the bottom.

Step 1: Prepare Your Data

Your raw data should be in a clean Excel sheet with:

  • Sieve sizes (mm or phi) in column A
  • Weight retained (grams) in column B

Citation and Version Reporting

When reporting results, include: software name (Gradistat), version (v91), date of analysis, and which calculation methods were used (e.g., Folk & Ward graphical method). This aids reproducibility and comparison across studies.

The Frustrations (The Weaknesses)

1. The User Interface (Circa Windows 95) Prepare for pain. The UI is purely functional: gradistat v 91 free

  • No drag-and-drop. You must format data in a specific .txt or .dat template.
  • Graphs? Barely. Output is text tables. You will export to Excel or R for plotting.
  • The input wizard is cryptic: "Column 1 = abundance, Column 2 = gradient mid-point, Column 3 = sample weight." Miss this order? The program crashes silently.

2. Data Size Limitations Because it’s a 32-bit legacy application, v9.1 Free struggles with modern big data:

  • Max ~32,000 data points.
  • Max ~255 species per run.
  • It will hang if you feed it a 500MB CSV file.

3. No Help File in the Free Version The free distribution often strips out the manual. You are left with a single readme.txt that assumes you already know the difference between "Gaussian response" and "Hofker's method." New users will be lost. Gradistat V91 — Free Download and Overview Step

4. "v9.1" – Where are the updates? The last stable free release was archived around 2008. It does not support 64-bit natively (though runs via compatibility mode). It does not support Unicode – your species names must be ASCII only.

What is Gradistat v 9.1?

Gradistat (Version 9.1) is a Microsoft Excel macro-enabled workbook developed by Simon J. Blott and Kenneth Pye of the now-closed Kenneth Pye Associates Ltd. (later part of Foster Wheeler). It was first introduced in the early 2000s and became the industry standard because it automated the tedious, error-prone process of calculating Folk and Ward (1957) graphical statistics, moments statistics, and the logarithmic method of moments. Go to the Input sheet

Key Facts:

  • Latest free version: 9.1 (sometimes written as v91 or 9.1)
  • Platform: Microsoft Excel (Windows only; Mac compatibility is limited)
  • License: Freeware for non-commercial, academic, and personal use
  • Primary functions: Sieve and hydrometer analysis, grain size statistics, graphical output, ternary plotting (sand-silt-clay)