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Data Analysis

Nemenyi Critical-Difference & Friedman Rank Plotter

Friedman and Iman-Davenport tests with exact p-values, average ranks, the Nemenyi critical difference and the classic CD diagram with cliques — plus an optional Bonferroni-Dunn overlay against a control model.

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Quick start

Call this tool from your code in three languages.

cURL
curl -X POST 'https://api.elysiatools.com/en/api/tools/nemenyi-critical-difference-friedman-rank-plotter' \
  -H 'Content-Type: application/json' \
  -d '{"matrix":"dataset, AdaBoost, SVM, kNN, C4.5\nd1, 0.95, 0.83, 0.76, 0.69\nd2, 0.96, 0.77, 0.84, 0.70\nd3, 0.94, 0.82, 0.75, 0.68\nd4, 0.95, 0.76, 0.83, 0.69\nd5, 0.96, 0.84, 0.77, 0.70\nd6, 0.94, 0.75, 0.82, 0.68\nd7, 0.95, 0.83, 0.76, 0.69\nd8, 0.96, 0.77, 0.84, 0.70\nd9, 0.94, 0.82, 0.75, 0.68\nd10, 0.95, 0.76, 0.83, 0.69\nd11, 0.96, 0.84, 0.77, 0.70\nd12, 0.94, 0.75, 0.82, 0.68","direction":"higher","alpha":"0.05","posthoc":"nemenyi","control":"exact column name of the baseline model"}'

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API reference

Send a POST request with your inputs as JSON. File parameters require a separate upload first.

Endpoint

HTTP
POST https://api.elysiatools.com/en/api/tools/nemenyi-critical-difference-friedman-rank-plotter

Parameters

NameTypeRequiredDescription
matrixtextareaYes—
directionselectYes—
alphaselectYes—
posthocselectYes—
controltextNo—

Response format

HTML result

JSON
{
  "result": "<div>Processed HTML content</div>",
  "error": "Error message (optional)",
  "message": "Notification message (optional)",
  "metadata": {
    "key": "value"
  }
}

MCP integration

Add this tool to your Model Context Protocol server so AI agents can list and call it.

Server configuration

Add this block to your MCP client configuration:

mcp.json
{
  "mcpServers": {
    "elysiatools-nemenyi-critical-difference-friedman-rank-plotter": {
      "name": "nemenyi-critical-difference-friedman-rank-plotter",
      "description": "Friedman and Iman-Davenport tests with exact p-values, average ranks, the Nemenyi critical difference and the classic CD diagram with cliques — plus an optional Bonferroni-Dunn overlay against a control model.",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=nemenyi-critical-difference-friedman-rank-plotter",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

List available tools

After connecting to the SSE endpoint, list the exposed tools:

tools/list
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/list"
}

Call this tool

Invoke the tool by its id, passing arguments built from its parameters:

tools/call
{
  "jsonrpc": "2.0",
  "id": 2,
  "method": "tools/call",
  "params": {
    "name": "nemenyi-critical-difference-friedman-rank-plotter",
    "arguments": {
  "matrix": "dataset, AdaBoost, SVM, kNN, C4.5\nd1, 0.95, 0.83, 0.76, 0.69\nd2, 0.96, 0.77, 0.84, 0.70\nd3, 0.94, 0.82, 0.75, 0.68\nd4, 0.95, 0.76, 0.83, 0.69\nd5, 0.96, 0.84, 0.77, 0.70\nd6, 0.94, 0.75, 0.82, 0.68\nd7, 0.95, 0.83, 0.76, 0.69\nd8, 0.96, 0.77, 0.84, 0.70\nd9, 0.94, 0.82, 0.75, 0.68\nd10, 0.95, 0.76, 0.83, 0.69\nd11, 0.96, 0.84, 0.77, 0.70\nd12, 0.94, 0.75, 0.82, 0.68",
  "direction": "higher",
  "alpha": "0.05",
  "posthoc": "nemenyi",
  "control": "exact column name of the baseline model"
}
  }
}
Chain multiple tools in one session with a comma-separated toolId list, e.g. /mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp (max 20).

Questions or issues? Contact [email protected]

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