fdth is an R package for frequency distribution tables, associated histograms, and polygons for numerical and categorical variables.

Key Features

• Frequency distribution tables from vectors, matrices, and data frames.
• Support for numerical (fdt) and categorical (fdt_cat) variables.
• Associated graphics, including histograms and frequency polygons.
• Summary measures from grouped data (for example, mean, median, and mode).
• Reporting support with xtable.

Installation

Install from CRAN:

install.packages("fdth")

Install the development version from GitHub:

# install.packages("remotes")
remotes::install_github("jcfaria/fdth")

Quick Start

library(fdth)
set.seed(123)
x <- rnorm(100, mean = 20, sd = 3)
ft <- fdt(x)
ft
plot(ft)
summary(ft)
# Most frequent value (mode) from grouped data
mfv(ft)

Project Layout

• /R: Core functions and S3 methods.
• /man: Reference documentation (.Rd files).
• /demo: Runnable examples (demo()).
• /tests: Automated tests (testthat).
• /vignettes: Tutorials and longer-form documentation.

Contributing

Contributions are welcome. Open an issue or submit a pull request with:

• Bug fixes and performance improvements.
• Documentation and usability updates.
• New ideas for tables, summaries, and visual workflows.

To check and build locally:

R CMD check fdth
R CMD build fdth
R CMD INSTALL fdth_X.X-X.tar.gz

Roadmap

• Expand automated tests for edge cases.
• Improve examples for multimodal and grouped-data scenarios.
• Keep documentation aligned with current S3 behavior.

Developed by:
Faria, J. C.; Allaman, I. B.; Jelihovschi, E. G.
Universidade Estadual de Santa Cruz - UESC
Departamento de Ciencias Exatas - DCEX
Ilheus - Bahia - Brasil