Generates design matrix for analysing real paired comparisons and derived paired comparison data (Likert type items/ratings or rankings) using a loglinear approach. Fits loglinear Bradley-Terry model (LLBT) exploiting an eliminate feature. Computes pattern models for paired comparisons, rankings, and ratings. Some treatment of missing values (MCAR and MNAR). Fits latent class (mixture) models for paired comparison, rating and ranking patterns using a non-parametric ML approach.

A visualization toolkit for preferential data, such as ranked-choice election results, tournament outcomes,
    and survey responses. The package provides methods to visualise the preference distribution of one contest with
    bar charts and pairwise comparisons of two contestants, as well as methods to visualise multiple contests through
    2D and high-dimensional simplex plots both statically and interactively. HD simplex displays are implemented via projection
    methods using the 'tourr' and 'detourr' packages, enabling dynamic exploration of high-dimensional preference structure.
    For more details on HD simplex projection, see Wickham et al. (2011) <doi:10.21105/joss.03419>.

Provides functionality for calculating pregnancy-related dates and
    tracking medications during pregnancy and fertility treatment. Calculates
    due dates from various starting points including last menstrual period and
    IVF (In Vitro Fertilisation) transfer dates, determines pregnancy progress
    on any given date, and identifies when specific pregnancy weeks are
    reached. Includes medication tracking capabilities for individuals
    undergoing fertility treatment or during pregnancy, allowing users to
    monitor remaining doses and quantities needed over specified time periods.
    Designed for those tracking their own pregnancies or supporting partners
    through the process, making use of options to personalise output messages.
    For details on due date calculations, see
    <https://www.acog.org/clinical/clinical-guidance/committee-opinion/articles/2017/05/methods-for-estimating-the-due-date>.