A simple syntax to change the default values for function
  arguments, whether they are in packages or defined locally.

Parses command line arguments and supplies values to scripts. Users can specify names to which parsed inputs are assigned, value types into which inputs are cast, long options or short options, input splitters and callbacks that define how options should be specified and how input values are supplied.

Creates 'define.xml' documents used for regulatory 
    submissions based on spreadsheet metadata.  Can also help
    create metadata and generate HTML data explorer.

Use numerical optimization to fit ordinary differential equations (ODEs) to time series data to examine the dynamic relationships between variables or the characteristics of a dynamical system. It can now be used to estimate the parameters of ODEs up to second order, and can also apply to multilevel systems. See <https://github.com/yueqinhu/defit> for details.

Simple functions to deflate nominal Brazilian Reais using several popular price indexes downloaded from the Brazilian Institute for Applied Economic Research.

Implements the 'deflist' class, a read-only list-like object that accesses its elements via a function.
    The 'deflist' class can be used to model deferred access to data or computations by routing indexed list access to a function.
    This approach is particularly useful when sequential list-like access to data is required but holding all the data in memory at once is not feasible.
    The package also provides utilities for memoisation and caching to optimize access to frequently requested elements.

Implements two out-of box classifiers presented in <doi:10.48550/arXiv.2112.01063> for 
    distinguishing forest and non-forest terrain images. Under these algorithms, there are 
    frequentist approaches: one parametric, using stable distributions, and another one- 
    non-parametric, using the squared Mahalanobis distance. The package also contains functions for 
    data handling and building of new classifiers as well as some test data set.