Plots with high flexibility and easy handling, including
  informative regression diagnostics for many models.

Tools for both single and batch image manipulation and
    analysis (Olivoto, 2022 <doi:10.1111/2041-210X.13803>) and
    phytopathometry (Olivoto et al., 2022 <doi:10.1007/S40858-021-00487-5>).
    The tools can be used for the quantification of leaf area, object
    counting, extraction of image indexes, shape measurement, object
    landmark identification, and Elliptical Fourier Analysis of object
    outlines (Claude (2008) <doi:10.1007/978-0-387-77789-4>). The package
    also provides a comprehensive pipeline for generating shapefiles with
    complex layouts and supports high-throughput phenotyping of RGB,
    multispectral, and hyperspectral orthomosaics. This functionality
    facilitates field phenotyping using UAV- or satellite-based imagery.

Receiver Operating Characteristic (ROC) analysis is performed assuming samples are from the Power Lindley distribution. Specificity, sensitivity, area under the curve and ROC curve are provided.

Item response theory based methods are used to compute
        linking constants and conduct chain linking of unidimensional
        or multidimensional tests for multiple groups under a common
        item design.  The unidimensional methods include the Mean/Mean,
        Mean/Sigma, Haebara, and Stocking-Lord methods for dichotomous
        (1PL, 2PL and 3PL) and/or polytomous (graded response, partial
        credit/generalized partial credit, nominal, and multiple-choice
        model) items.  The multidimensional methods include the least
        squares method and extensions of the Haebara and Stocking-Lord
        method using single or multiple dilation parameters for
        multidimensional extensions of all the unidimensional
        dichotomous and polytomous item response models.  The package
        also includes functions for importing item and/or ability
        parameters from common IRT software, conducting IRT true score
        and observed score equating, and plotting item response
        curves/surfaces, vector plots, information plots, and comparison 
        plots for examining parameter drift.