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Compare Signals

Overview​

Compare Signals compares selected curves to a reference and reports summary metrics plus diagnostic plots.

Required Inputs​

  • Two or more selected curves
  • Curves with matching signal units
  • Reference Signal
    • AVERAGE (default), or
    • Any selected curve
  • Apply Filter (optional)
  • Filter CFC
    • 60, 180, 600, or 1000
  • Corridor Size (Signal Units)
  • Apply Truncate (optional)
  • Start Time (s)
  • End Time (s)

Calculation​

  1. Harmonize input curves and optionally apply filtering.
  2. If truncation is enabled, trim curves to the selected time window.
  3. Choose the reference curve (selected curve or average of selected curves).
  4. Align each compared curve to the reference.
  5. Compute residuals and summary metrics.
  6. Generate diagnostic curves for residual distribution and lag correlation.
  7. Generate corridor views around the reference.
    • Fixed Corridor Plot uses Corridor Size (Signal Units).
    • Residual Standard Deviation Corridor Plot uses residual standard deviation.
    • 90% Residual Distribution Corridor Plot uses residual spread scaled for 90% residual coverage.

Output​

Compare Signals returns:

  1. Summary metrics table (one row per compared curve)
    • Abs. Peak Magnitude
    • Mean of Residuals
    • Standard Deviation of Residuals
    • Percentage of Samples Outside Fixed Corridor
    • Cosine Similarity
    • T Statistic
    • Zero through Fifth Moment Difference
  2. Processed input curves
  3. Reference curve
  4. Residual curves
  5. Cumulative residual distribution curves
  6. Cross-correlation curves
  7. Corridor curves
    • Fixed corridor
    • Residual standard deviation corridor
    • 90% residual distribution corridor (legend label: 90% Residual Coverage)

If a specific curve is selected as reference, that same curve is excluded from comparison rows. Its data is also excluded from residual-spread estimates used for corridor widths.

For corridor details, see Generate Corridor.