Implements policy evaluation primitives from HM Treasury
    Magenta Book guidance (HM Treasury, 2020): theory of change and
    log-frame construction, evaluation planning and stakeholder mapping,
    power and minimum-detectable-effect calculations for randomised
    designs (including cluster and stepped-wedge designs following
    'Hussey' and 'Hughes' (2007) <doi:10.1016/j.cct.2006.05.007> and
    'Hemming' et al. (2015) <doi:10.1136/bmj.h391>), Maryland Scientific
    Methods Scale ratings, structured confidence ratings, light-weight
    difference-in-differences and interrupted-time-series estimators
    ('Bernal' et al. (2017) <doi:10.1093/ije/dyw098>) with cluster-robust
    standard errors ('Cameron' and 'Miller' (2015) <doi:10.3368/jhr.50.2.317>),
    pre-treatment balance checks ('Stuart' (2010) <doi:10.1214/09-STS313>),
    and cost-effectiveness analysis (cost per outcome, incremental
    cost-effectiveness ratio, acceptability curves, incremental net
    benefit, quality-adjusted and disability-adjusted life years).
    Designed as the evaluation companion to the appraisal package
    'greenbook'. Bundled rubric and reference tables carry vintage
    metadata for reproducibility.

Provides fast and accurate inference for the parameter estimation problem in Ordinary Differential
    Equations, including the case when there are unobserved system components. Implements the MAGI method
    (MAnifold-constrained Gaussian process Inference) of Yang, Wong, and Kou (2021) <doi:10.1073/pnas.2020397118>.
    A user guide is provided by the accompanying software paper Wong, Yang, and Kou (2024) <doi:10.18637/jss.v109.i04>.

A collection of functions for the manipulation and
 analysis of arbitrarily dimensioned arrays.  The original motivation
 for the package was the development of efficient, vectorized
 algorithms for the creation and investigation of magic squares and
 high-dimensional magic hypercubes.

Functions to make useful (and pretty) plots for scientific plotting. Additional plotting features are added for base plotting, with particular emphasis on making attractive log axis plots.