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.

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/.