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ordinal

Regression Models for Ordinal Data

v2025.12-29 · Jan 10, 2026 · GPL (>= 2)

Description

Implementation of cumulative link (mixed) models also known as ordered regression models, proportional odds models, proportional hazards models for grouped survival times and ordered logit/probit/... models. Estimation is via maximum likelihood and mixed models are fitted with the Laplace approximation and adaptive Gauss-Hermite quadrature. Multiple random effect terms are allowed and they may be nested, crossed or partially nested/crossed. Restrictions of symmetry and equidistance can be imposed on the thresholds (cut-points/intercepts). Standard model methods are available (summary, anova, drop-methods, step, confint, predict etc.) in addition to profile methods and slice methods for visualizing the likelihood function and checking convergence.

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OK 14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE Mar 9, 2026

Reverse Dependencies (55)

Dependency Network

Dependencies Reverse dependencies ucminf MASS Matrix numDeriv nlme RcmdrPlugin.MPAStats metaSDTreg AutoScore EQUALSTATS GRAB crch drord ecoCopula gomp jomo optimus pda projpred remiod serp +40 more reverse deps ordinal

Version History

new 2025.12-29 Mar 9, 2026