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Display Modes for Extinction Probabilities

repr_mode.Rd

A pair of internal functions for formatting extinction probabilities: repr_mode() decides how to represent a probability \(G\) based on its magnitude, and format_by_mode() formats numbers accordingly for presentation. These functions affect display only and do not alter underlying calculations.

Usage

repr_mode(g)

Arguments

g

Numeric scalar, a probability in the unit interval. May be non-finite.

Value

repr_mode() returns a character scalar, one of:

  • "linear_G" – display \(G\) on the linear scale;

  • "log_G" – display \(G\) on log10 scale for tiny probabilities;

  • "log_Q" – display \(Q=1-G\) on log10 scale when \(G \approx 1\);

  • "undefined" – input was not finite.

format_by_mode() returns a character scalar formatted according to the selected mode and the kind of value (point estimate, lower, or upper CI bound).

Details

Probabilities very close to 0 or 1 are displayed on a log scale to improve readability. The thresholds are fixed at 1e-300 ("near zero") and 1 - 1e-15 ("near one"). Non-finite inputs are reported as "undefined".

Author

Hiroshi Hakoyama, hiroshi.hakoyama@gmail.com