Encrypts and decrypts strings using either the Caesar cipher or a pseudorandom number generation (using set.seed()) method.

Visualizes results of item analysis such as item difficulty, item discrimination, and coefficient alpha for ease of result communication.

Variance estimation on indicators of income concentration and poverty using complex sample survey designs. Wrapper around the survey package.

This package provides a system for the management, assessment, and psychometric analysis of data from educational and psychological tests.

Basic routines used in scientific coding, such as timing routines, vector/array handing functions and I/O support routines.

Example datasets from the book "An Introduction to Generalised Linear Models" (Year: 2018, ISBN:9781138741515) by Dobson and Barnett.

This package provides a dibble that implements data cubes (derived from dimensional tibble'), and allows broadcasting by dimensional names.

Utilities for building certain kinds of common matrices and models in the extended structural equation modeling package, OpenMx'.

Streamlines downloading and cleaning biodiversity data from Integrated Digitized Biocollections (iDigBio) and the Global Biodiversity Information Facility (GBIF).

An implementation of Gini-based weighting approaches in constructing composite indicators, providing functionalities for normalization, aggregation, and ranking comparison.

Quantification, analysis, and visualization of urban greenness within city networks using data from OpenStreetMap <https://www.openstreetmap.org>.

Data sets and scripts used in the book Generalized Additive Models: An Introduction with R', Wood (2006,2017) CRC.

Fits sex-specific life-history models for fish and other taxa where some of the individuals have unknown sex.

Fits a linear excess relative risk model by maximum likelihood, possibly including several variables and allowing for lagged exposures.

Define, manipulate and plot meshes on simplices, spheres, balls, rectangles and tubes. Directional and other multivariate histograms are provided.

This package provides functions for creating designs for mixture experiments, making ternary contour plots, and making mixture effect plots.

This package provides a non-parametric test for multi-observer concordance and differences between concordances in (un)balanced data.

We fit inverse probability weighting estimator and the augmented inverse probability weighting for non-monotone missing at random data.

This package implements a nonparametric statistical test for rank or score data from partially-balanced incomplete block-design experiments.

This package provides tools to analyze and infer orthology and paralogy relationships between glutamine synthetase proteins in seed plants.

Defines thresholds for breaking data into a number of discrete levels, minimizing the (mean) squared error within all bins.

This package provides a parallel estimation method for generalized linear models without compiling with a multithreaded LAPACK or BLAS.

It provides functions to perform permutation conditional random one-sample and two-samples t-tests in a multivariate framework.

Generates, plays, and solves Sudoku puzzles. The GUI playSudoku() needs package "tkrplot" if you are not on Windows.