Generates phylogenetic trees and distance matrices from a list
    of taxon names, or from a higher taxon expanded down to a chosen lower
    rank. Trees are obtained as induced subtrees of the Open Tree of Life
    synthetic tree using the 'rotl' package (Michonneau, Brown and Winter,
    2016, <doi:10.1111/2041-210X.12593>). Expansion of a higher taxon to its
    descendants uses 'taxize' (Chamberlain and Szocs, 2013,
    <doi:10.12688/f1000research.2-191.v2>).

It calculates the Air Pollution Tolerance Index (APTI) of plant species using biochemical parameters such as chlorophyll content, leaf extract pH, relative water content, and ascorbic acid content. It helps in identifying tolerant species for greenbelt development and pollution mitigation studies. It includes a 'shiny' app for interactive APTI calculation and visualisation. For method details see, Sahu et al. (2020).<DOI:10.1007/s42452-020-3120-6>.

Provides a quick method for visualizing non-aggregated line-list
    or aggregated census data stratified by age and one or two categorical
    variables (e.g. gender and health status) with any number of values. It
    returns a 'ggplot' object, allowing the user to further customize the
    output. This package is part of the 'R4Epis' project 
    <https://r4epis.netlify.app/>.

Developed for use by those tasked with the routine detection, characterisation and
            quantification of discrete changes in air quality time-series, such as identifying the impacts
            of air quality policy interventions. The main functions use signal isolation then
            break-point/segment (BP/S) methods based on 'strucchange' and 'segmented' methods to detect and
            quantify change events (Ropkins & Tate, 2021, <doi:10.1016/j.scitotenv.2020.142374>; Ropkins et
            al., 2026, <doi:10.21105/joss.08839>).

Display air quality model output and monitoring data using scatterplots, grids, and legends.

Functions are included for recalling AQL (Acceptable Quality Level or Acceptance Quality Level) 
 Based single, double, and multiple attribute sampling plans from the Military Standard (MIL-STD-105E) - American 
 National Standards Institute/American Society for Quality (ANSI/ASQ Z1.4) tables and for retrieving variable
 sampling plans from Military Standard (MIL-STD-414) - American National Standards Institute/American Society
 for Quality (ANSI/ASQ Z1.9) tables. The sources for these tables are listed in the URL: field. Also included
 are functions for computing the OC (Operating Characteristic) and ASN (Average Sample Number) coordinates
 for the attribute plans it recalls, and functions for computing the estimated proportion nonconforming and
 the maximum allowable proportion nonconforming for variable sampling plans. The MIL-STD AQL Sampling schemes
 were the most used and copied set of standards in the world. They are intended to be used for sampling a stream
 of lots, and were used in contract agreements between supplier and customer companies. When the US military
 dropped support of MIL-STD 105E and 414, The American National Standards Institute (ANSI) and the International
 Standards Organization (ISO) adopted the standard with few changes or no changes to the central tables. This
 package is useful because its computer implementation of these tables duplicates that available in other
 commercial software and subscription online calculators.