Relative (fractional) error (δ = absolute error divided by reference magnitude (mean)
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δ = absolute error divided by reference magnitude (mean or true).
What each symbol means
| Symbol | What it stands for |
|---|---|
| δ | Relative error (dimensionless) |
| Δx | Absolute error |
| x_ref | Mean or true value used in problem |
When to use this
x_ref must be non-zero; same reference must be used consistently in multi-step problems.