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”).