The functions needed to perform tight clustering Algorithm.

Tightens an observational block design into a smaller design with either smaller or fewer blocks while controlling for covariates. The method uses fine balance, optimal subset matching (Rosenbaum, 2012 <doi:10.1198/jcgs.2011.09219>) and two-criteria matching (Zhang et al 2023 <doi:10.1080/01621459.2021.1981337>).  The main function is tighten().  The suggested 'rrelaxiv' package for solving minimum cost flow problems: (i) derives from Bertsekas and Tseng (1988) <doi:10.1007/BF02288322>, (ii) is not available on CRAN due to its academic license, (iii) may be downloaded from GitHub at <https://github.com/josherrickson/rrelaxiv/>, (iv) is not essential to use the package.

Write modelling results into a database for
    'tigreBrowser', a web-based tool for browsing figures and summary
    data of independent model fits, such as Gaussian process models
    fitted for each gene or other genomic element. The browser is
    available at <https://github.com/PROBIC/tigreBrowser>.

Download TIGER/Line shapefiles from the United States Census Bureau
    (<https://www.census.gov/geographies/mapping-files/time-series/geo/tiger-line-file.html>)
    and load into R as 'sf' objects.

Tools to import, clean, validate, and analyze freshwater quality data in Brazil.
    Implements water quality indices including the Water Quality Index (WQI/IQA),
    the Trophic State Index (TSI/IET) after Carlson (1977) <doi:10.4319/lo.1977.22.2.0361>
    and Lamparelli (2004) <https://www.teses.usp.br/teses/disponiveis/41/41134/tde-20032006-075813/publico/TeseLamparelli2004.pdf>,
    and the National Sanitation Foundation Water Quality Index (NSF WQI)
    <doi:10.1007/s11157-023-09650-7>. The package also checks
    compliance with Brazilian standard CONAMA Resolution 357/2005
    <https://conama.mma.gov.br/?id=450&option=com_sisconama&task=arquivo.download>
    and generates reproducible reports for routine monitoring workflows.

Collect  marketing data from TikTok Ads using the 'Windsor.ai' API <https://windsor.ai/api-fields/>.