chva.extras

Supplementary Tools for Climate and Health Research in Virginia

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chva.extras is a collection of supplementary functions and templates designed to support climate and health research in Virginia, including tools for data manipulation, analysis, and visualization, tailored to handle large datasets.

Le-Huynh, T.-L., Davis, R. E., Novicoff, W. M., & DeGuzman, P. B. (2025). chva.extras: Supplementary Tools for Climate and Health Research in VA (Version v0.1.0) [Computer software]. Zenodo. https://doi.org/10.5281/zenodo.14910967

Installation

To get the latest in-development features, install the development version from GitHub:

if(!requireNamespace("devtools", quietly = TRUE)) {
 install.packages("devtools")
}
devtools::install_github("le-huynh/chva.extras")

This package is also accessible for download via Zenodo at 10.5281/zenodo.14910967.

Functions

See Package index for full list of functions.

  1. Convert files to Parquet format
  • get_parquet_arrow(): Convert multiple files to Parquet format.
  • get_parquet_by_chunk(): Convert file to Parquet format by chunks.
  1. Support handy workflow
  • check_overview(): Provide an overview of datasets.
  • check_unique_value(): Count unique values of a specified column.
  • get_dataset(): Get full working datasets as a named list of Dataset R6 objects.
  • recode_values(): Recode values based on grouping logic.
  1. Compute indices used in climate health research
  • Humidity variables: cal_absolute_humidity(), cal_dewpoint_temperature(), cal_mixing_ratio(), cal_relative_humidity(), cal_specific_humidity().
  • Comfort indices: cal_apparent_temperature(), cal_humidex(), cal_temperature_humidity_index().
  • cal_saturation_vapor_pressure()
  1. Support visualization
  • plot_contour_dlnm(): Generate a filled contour plot for DLNM output with custom color levels.

For a comprehensive overview of the package’s functions, check out the package website at
le-huynh.github.io/chva.extras/.