Statistics Overview

MAPS can attach statistical analysers to event streams.
These analysers consume events, compute statistics, and periodically emit a summary event in JSON format.

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Available Analysers

Analyser	Metrics Produced
Base	open, close, high, low, average
Advanced	Base + stdDev, slope, intercept
Moment	Advanced + skewness, kurtosisExcess
MovingAverage	Base + 1, 5, 10, 15 minute moving averages
Quality	Advanced + missing, NaN, infinite, outliers, outlierStdDevs
Quantiles	Advanced + median, p90, p95, p99
Trend	Advanced + timestampSlopePerSec, timestampIntercept
Window	windowSize, windowCount, windowMean, windowStdDev

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Example Outputs

Advanced Example

{
  "temperature": {
    "first": 27.8,
    "last": 27.9,
    "min": 27.7,
    "max": 27.9,
    "average": 27.84,
    "count": 10,
    "stdDev": 0.0699,
    "slope": -0.0024,
    "intercept": 27.85
  },
  "O₂": {
    "first": 19.5,
    "last": 19.5,
    "min": 19.5,
    "max": 19.5,
    "average": 19.5,
    "count": 10,
    "stdDev": 0,
    "slope": 0,
    "intercept": 19.5
  }
}

Mixed Numeric + String Example

{
  "Product Name": {
    "totalCount": 10,
    "distribution": [
      { "value": "SEN66", "count": 10 }
    ]
  },
  "CO₂": {
    "first": 488,
    "last": 488,
    "min": 488,
    "max": 488,
    "average": 488,
    "count": 10,
    "stdDev": 0,
    "slope": 0,
    "intercept": 488
  },
  "airQualityValue": {
    "totalCount": 10,
    "distribution": [
      { "value": "Hazardous", "count": 10 }
    ]
  }
}

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Configuration

Statistics are configured inside inter-server connections.
See Inter-Server Connections for full context.

Example:

links:
  - direction: push
    local_namespace: "/sensors/#"
    remote_namespace: "/satellite/#"
    include_schema: false
    analytics:
      defaultAnalyser: Advanced
      eventCount: 10
      ignoreList: "timestamp"

• eventCount: number of events to accumulate before emitting a statistics event.
• defaultAnalyser: which analyser to use (Base, Advanced, Moment, etc.).
• ignoreList: comma-separated list of keys that will be excluded from analysis.

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Notes

• Currently, statistics can only be configured on inter-server connections.
• Support for client-level statistics is planned in future versions, once namespace integration is finalized.
• Summary events are valid JSON and can be routed, archived, or further transformed like any other MAPS event.