Read and write 'GraphPad Prism' '.pzfx' files in R.

Mortality Rates are usually published following an abridged description, 
              i.e., by age groups 0, [1, 5[, [5, 10[, [10, 15[ and so on. For some applications, 
              a detailed (single) ages description is required. Despite the huge number of the 
              proposed methods in the literature, there is a limited number of methods ensuring a
              high performance at lower and higher ages in the same time. For example, the 6-terms 
              'Lagrange' interpolation function is well adapted to mortality  interpolation at lower
              ages (with unequal intervals) but is not adapted to higher ages. On the other hand, 
              the 'Karup-King' method allows a good performance at higher ages but not adapted to lower ages.
              Interested readers can refer to the book of Shryock, Siegel and Associates (1993) for a detailed
              overview of the two cited methods.The package Q2q allows combining both the two methods to allow
              interpolating mortality rates at all ages. First, it starts by implementing each method separately,
              then the resulted curves are joined based on a 5-age averaged error between the two curves.

Construct message-passing style objects with types and features. Q7 types uses composition instead of inheritance in creating derived types, allowing defining any code segment as feature and associating any feature to any object. Compared to R6, Q7 is simpler and more flexible, and is more friendly in syntax.

Functions for descriptive statistics,
  data management, and data visualization.

A copula-based measure for quantifying asymmetry in dependence and associations. Documentation and theory about 'qad' is provided
    by the paper by Junker, Griessenberger & Trutschnig (2021, <doi:10.1016/j.csda.2020.107058>), and the paper by Trutschnig (2011, <doi:10.1016/j.jmaa.2011.06.013>).

A tool for automatic generation of sibling items from a parent item model defined by
           the user. It is an implementation of the process automatic item generation (AIG) focused
           on generating quantitative multiple-choice type of items (see Embretson, Kingston
           (2018) <doi:10.1111/jedm.12166>).