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First release.
fuzzy_number_trapezoid(),
fuzzy_number_triangle(),
fuzzy_number_interval() and
fuzzy_number_crisp() build vague quantities.alpha_cuts(), support(),
core(), membership(),
fuzzy_spread(), is_crisp(),
as_crisp() and as_fuzzy_number() inspect
them.+ - * / ^ and exp() follow
interval arithmetic on the alpha-cuts.defuzz() implements nine type-reduction rules.fuzzy_surv() bundles fuzzy times with failure degrees,
the analogue of survival::Surv().sim_fuzzy_surv() generates exact times and then
coarsens them the way a record does, for validation studies.fuzzy_dfs, a simulated example of 240 subjects with
quarterly examinations.fkm(), the fuzzy Kaplan-Meier estimator, with grouped
fits, alpha-cut bounds and a fuzzy survival difference.fcox(), the fuzzy Cox proportional hazards model,
giving fuzzy coefficients, hazard ratios and p-values.flogrank(), a fuzzy log-rank test for two groups.All three reduce exactly to their survival counterparts
on precise data.
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.
Health stats visible at Monitor.