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extr 1.0.0 (2025-09-15)

Up to 0.9.0

• Core extinction-risk estimator ext_di for density-independent (drifted Wiener) models. Provides:
  • MLEs of growth rate and environmental variance from irregular time series.
  • Point estimate of extinction probability.
  • Confidence intervals for extinction probability (w-z method) with near-nominal coverage.
  • QQ-plot diagnostic optional.

Changes in 1.0.0

• Numerical stability and range
  • Adaptive probability representation on G, log G, and log(1-G). The complement is used when G is near 0 or 1 to maintain accuracy.
  • The log scale removes double-precision bounds near 0 and 1, extending the safe window down to symbolic exp(-DBL_MAX). Probabilities close to 0 or 1 are displayed as 10^-* or 1-10^-*.
• Printed output
  • Printed precision is configurable via options(“extr.digits”).

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
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