Package: varunayan 0.4.0

Saket Choudhary

varunayan: Download and Process 'ERA5', IMD, 'HadEX3' and 'CRU TS' Data

Download climate data for a bounding box, polygon or point and return tidy tables. Sources are the 'ERA5' reanalysis (Hersbach et al. (2020) <doi:10.1002/qj.3803>) from the 'Copernicus' Climate Data Store <https://cds.climate.copernicus.eu/>, India Meteorological Department (IMD) gridded rainfall and temperature (Pai et al. (2014) <doi:10.54302/mausam.v65i1.851>), 'HadEX3' climate extremes (Dunn et al. (2020) <doi:10.1029/2019JD032263>) and 'CRU TS' (Harris et al. (2020) <doi:10.1038/s41597-020-0453-3>). Computes heat stress indices, including wet-bulb globe temperature (Liljegren et al. (2008) <doi:10.1080/15459620802310770>) and the Universal Thermal Climate Index (Bröde et al. (2012) <doi:10.1007/s00484-011-0454-1>), and heatwave indicators, including the Excess Heat Factor (Nairn and Fawcett (2015) <doi:10.3390/ijerph120100227>).

Authors:Saket Choudhary [aut, cre, cph], Darakhshan Nehal [aut], James C. Liljegren [ctb], UChicago Argonne, LLC [cph]

varunayan_0.4.0.tar.gz
varunayan_0.4.0.zip(r-4.7-any)varunayan_0.4.0.zip(r-4.6-any)
varunayan_0.4.0.tar.gz(r-4.7-any)varunayan_0.4.0.tar.gz(r-4.6-any)
varunayan_0.4.0.tgz(r-4.6-emscripten)
manual.pdf |manual.html✨
DESCRIPTION |NEWS
card.svg |card.png
varunayan/json (API)

# Install 'varunayan' in R:

install.packages('varunayan', repos = c('https://cran.r-universe.dev', 'https://cloud.r-project.org'))

Bug tracker:https://github.com/saketlab/varunayan/issues

Pkgdown/docs site:https://varunayan.saketlab.org

On CRAN:

2.70 score 152 exports 51 dependencies

Last updated from:ac99df333c. Checks:6 OK. Indexed: yes.

Target	Result	Time
linux-devel	OK	225
source / vignettes	OK	252
linux-release	OK	266
windows-devel	OK	221
windows-release	OK	248
wasm-release	OK	186

Exports:aggregate_imd_by_frequency aggregate_to_polygons anomaly cache_stats calc_heat_indices categorize_variables check_grid_coverage check_system_readiness CheckSystemReadiness clear_cache clear_timings ClearCache compare compare_grids cross_correlation cru_ts_bbox cru_ts_geojson CRUTSBbox CRUTSGeojson describe_variables DescribeVariables dewpoint_from_relative_humidity download_imd_rainfall download_imd_temperature era5ify_bbox era5ify_geojson era5ify_point ERA5ifyBbox ERA5ifyGeojson ERA5ifyPoint excess_heat_factor exclude_cols exposure_indicators filter_imd_by_bbox filter_imd_by_geojson get_available_datasets get_available_pressure_levels get_cache_dir get_cds_credentials get_era5_country_temperature get_era5_daily_climate get_era5_daily_heat_data get_era5_daily_heat_index_data get_era5_daily_humidity get_era5_daily_temperature get_era5_daily_wet_bulb get_era5_daily_wind get_era5_monthly_heat_data get_era5_monthly_heat_index_data get_imd_grid_specs get_package_info get_timings GetAvailablePressureLevels GetCacheDir GetERA5CountryTemperature GetERA5DailyClimate GetERA5DailyHeatData GetERA5DailyHeatIndexData GetERA5DailyHumidity GetERA5DailyTemperature GetERA5DailyWetBulb GetERA5DailyWind GetERA5MonthlyHeatData GetERA5MonthlyHeatIndexData GetPackageInfo hadex3_bbox hadex3_geojson HadEX3Bbox HadEX3Geojson heat_index heat_index_from_dewpoint heat_index_risk_category heatwave_days humidex imd_exposure_bbox imd_rainfall_bbox imd_rainfall_geojson imd_rainfall_point imd_stations imd_temperature_bbox imd_temperature_by_region imd_temperature_geojson imd_terrain IMDExposureBbox IMDRainfallBbox IMDRainfallGeojson IMDRainfallPoint IMDStations IMDTemperatureBbox IMDTemperatureGeojson india_elevation is_max_var is_min_var is_rate_var is_sum_var list_available_variables list_cache list_cru_ts_variables list_hadex3_indices list_imd_datasets ListAvailableVariables ListCRUTSVariables ListHadEX3Indices load_india_boundaries max_vars mean_radiant_temperature min_vars ndbi ndvi peak_month plot_bars plot_ccf plot_dual_axis plot_heatmap plot_map plot_scatter plot_series populate_sample_cache PopulateSampleCache print_timing_summary process_imd_files rate_vars read_cdsapirc read_imd_rainfall read_imd_temperature regrid relative_humidity_from_dewpoint search_variable SearchVariable seasonal_cycle seasonal_stat setup_cds_credentials SetupCdsCredentials show_cache_info ShowCacheInfo spatial_mean sum_vars time_operation utci utci_category utci_sparse vapor_pressure_from_dewpoint visualize_grid_overlap warm_nights wbgt wbgt_from_dewpoint wbgt_liljegren wbgt_risk_category wbgt_shade wbgt_simple wet_bulb_from_dewpoint wet_bulb_temperature

Dependencies:abind askpass cachem class classInt cli cpp11 curl data.table DBI digest dplyr e1071 ecmwfr fastmap filelock generics getPass glue httr jsonlite KernSmooth keyring lifecycle lubridate magrittr memoise mime ncdf4 openssl pillar pkgconfig proxy R6 Rcpp rlang rstudioapi s2 sf stars sys terra tibble tidyselect timechange units utf8 vctrs withr wk yaml

Quickstart guide

Rendered fromquickstart.Rmdusingknitr::rmarkdown

Last update: 2026-10-29
Started: 2026-10-29

Citation

Readme and manuals

Help Manual

Help page	Topics
Aggregate data by temporal frequency	aggregate_by_frequency
Aggregate IMD data by temporal frequency	aggregate_imd_by_frequency
Aggregate gridded data to polygon regions	aggregate_to_polygons
Departure from the mean over a baseline period	anomaly
Get cache statistics	cache_stats
Calculate all heat stress indices	calc_heat_indices
Sort variables by aggregation method	categorize_variables
Calculate the grid coverage statistics for polygons	check_grid_coverage
Make sure that the system is ready for varunayan operations	CheckSystemReadiness check_system_readiness
Delete temporary files that match a pattern	cleanup_temp_files
Clear all time data	clear_timings
Clear cache	ClearCache clear_cache
Combine NetCDF files into one data.frame	combine_netcdf_files
Agreement statistics between two columns	compare
Compare two or more grids	compare_grids
Convert data to GeoJSON format	convert_to_geojson
Create GeoJSON from bounding box coordinates	create_geojson_from_bbox
Create temporary GeoJSON file	create_temp_geojson_file
Divide large date ranges into temporal chunks	create_temporal_chunks
Cross-correlation of two series	cross_correlation
Download CRU TS climate data for a bounding box	CRUTSBbox cru_ts_bbox
Download CRU TS climate data for a GeoJSON region	CRUTSGeojson cru_ts_geojson
Describe ERA5 variables in detail	DescribeVariables describe_variables
Calculate dewpoint from temperature and relative humidity	dewpoint_from_relative_humidity
Download ERA5 pressure-level data with ecmwfr	download_era5_pressure
Download ERA5 single-level data with ecmwfr	download_era5_single
Download IMD gridded rainfall data	download_imd_rainfall
Download IMD gridded temperature data	download_imd_temperature
Create the output directory if it does not exist	ensure_output_dir
Download and process ERA5 data for a bounding box	ERA5ifyBbox era5ify_bbox
Download and process ERA5 data for a point location	ERA5ifyPoint era5ify_point
Excess Heat Factor	excess_heat_factor
Columns to exclude from aggregation	exclude_cols
Heat exposure indicators	exposure_indicators
Extract data for a specified point location (nearest neighbor)	extract_point_data
Filter data.frame by GeoJSON polygon	filter_dataframe_by_geojson
Filter IMD data by spatial boundaries	filter_imd_by_bbox
Filter IMD data by GeoJSON polygon	filter_imd_by_geojson
Filter NetCDF data by spatial boundaries (bounding box)	filter_netcdf_by_bbox
Filter NetCDF data by GeoJSON polygon	filter_netcdf_by_geojson
Format date range for CDS API requests	format_date_range
Convert pressure levels to the character format necessary for the CDS API	format_pressure_levels
Get available dataset types	get_available_datasets
Get bounding box from sf object	get_bbox_from_sf
Get CDS API credentials from different sources	get_cds_credentials
Get IMD grid specifications	get_imd_grid_specs
Get all valid pressure-level variable names	get_pressure_level_variable_names
Get the dataset of pressure-level variables	get_pressure_level_variables
Get all valid single-level variable names	get_single_level_variable_names
Get the dataset of single-level variables	get_single_level_variables
Get time values for a frequency	get_time_values
Get all recorded time measurements	get_timings
Get the standard pressure levels that are available in ERA5	GetAvailablePressureLevels get_available_pressure_levels
Get cache directory path	GetCacheDir get_cache_dir
Get ERA5 temperature data for a country	GetERA5CountryTemperature get_era5_country_temperature
Download daily ERA5 climate data	GetERA5DailyClimate get_era5_daily_climate
Download ERA5 data and calculate heat stress indices	GetERA5DailyHeatData GetERA5DailyHeatIndexData get_era5_daily_heat_data get_era5_daily_heat_index_data
Download daily ERA5 humidity data	GetERA5DailyHumidity get_era5_daily_humidity
Download daily ERA5 temperature data	GetERA5DailyTemperature get_era5_daily_temperature
Download daily ERA5 wet bulb temperature data	GetERA5DailyWetBulb get_era5_daily_wet_bulb
Download daily ERA5 wind data	GetERA5DailyWind get_era5_daily_wind
Get monthly ERA5 heat stress index data	GetERA5MonthlyHeatData GetERA5MonthlyHeatIndexData get_era5_monthly_heat_data get_era5_monthly_heat_index_data
Get package version information	GetPackageInfo get_package_info
Download HadEX3 data on climate extremes for a bounding box	HadEX3Bbox hadex3_bbox
Download HadEX3 data on climate extremes for a GeoJSON region	HadEX3Geojson hadex3_geojson
Calculate heat index (apparent temperature)	heat_index
Calculate heat index from dewpoint	heat_index_from_dewpoint
Heat index risk categories	heat_index_risk_category
Heatwave days	heatwave_days
Calculate humidex (Canadian heat index)	humidex
Download IMD temperature aggregated for each GeoJSON feature (region x time)	imd_temperature_by_region
IMD heatwave terrain class of a location	imd_terrain
IMD heat exposure indicators for a bounding box	IMDExposureBbox imd_exposure_bbox
Download and process IMD rainfall data for a bounding box	IMDRainfallBbox imd_rainfall_bbox
Download and process IMD rainfall data for a GeoJSON region	IMDRainfallGeojson imd_rainfall_geojson
Download and process IMD rainfall for a single point (nearest grid cell)	IMDRainfallPoint imd_rainfall_point
IMD weather stations with coordinates	IMDStations imd_stations
Download and process IMD temperature data for a bounding box	IMDTemperatureBbox imd_temperature_bbox
Download and process IMD temperature data for a GeoJSON region	IMDTemperatureGeojson imd_temperature_geojson
Elevation of locations in India	india_elevation
Find if a variable uses maximum aggregation	is_max_var
Find if a variable uses minimum aggregation	is_min_var
Find if a variable is a rate variable	is_rate_var
Find if a variable uses sum aggregation	is_sum_var
Find if data is valid GeoJSON	is_valid_geojson
List cached files	list_cache
List available IMD datasets	list_imd_datasets
List all available variables for a dataset type	ListAvailableVariables list_available_variables
Variable data dictionary for CRU TS	ListCRUTSVariables list_cru_ts_variables
List the available HadEX3 ETCCDI indices	ListHadEX3Indices list_hadex3_indices
Load India state or district boundaries	load_india_boundaries
Variables for maximum aggregation	max_vars
Estimate mean radiant temperature	mean_radiant_temperature
Variables for minimum aggregation	min_vars
Normalized Difference Built-up Index	ndbi
Normalized Difference Vegetation Index	ndvi
Parse a date string in different formats	parse_date_flexible
Month of the largest long-term mean	peak_month
Bar chart coloured by value	plot_bars
Stem plot of a cross-correlation	plot_ccf
Two series on a left and a right axis	plot_dual_axis
Heat map of a matrix or of a long data frame	plot_heatmap
Map one or more columns of gridded or polygon data	plot_map
Scatter plot with the 1:1 line, r and bias	plot_scatter
Line plot, one line per group	plot_series
Fill the cache with sample IMD data	PopulateSampleCache populate_sample_cache
Print a summary of the time data	print_timing_summary
Process multiple IMD files	process_imd_files
Extract data from a NetCDF file into a data.frame	process_netcdf_to_dataframe
Rate variables to average	rate_vars
Read CDS API credentials from ~/.cdsapirc file	read_cdsapirc
Read IMD NetCDF rainfall file	read_imd_rainfall
Read IMD binary temperature file	read_imd_temperature
Average onto a coarser regular grid	regrid
Calculate relative humidity from temperature and dewpoint	relative_humidity_from_dewpoint
Search for ERA5 variables by keyword	SearchVariable search_variable
Mean for each calendar month	seasonal_cycle
Seasonal total or mean, averaged over years	seasonal_stat
Configure CDS credentials for ERA5 data access	SetupCdsCredentials setup_cds_credentials
Show cache contents and statistics	ShowCacheInfo show_cache_info
Spatial mean over grid points	spatial_mean
Variables to sum over time	sum_vars
Measure the time of an operation and record the duration	time_operation
Calculate UTCI (Universal Thermal Climate Index)	utci
UTCI thermal stress categories	utci_category
Calculate UTCI with a sparse regression approximation	utci_sparse
Make sure that bounding box coordinates are valid	validate_bbox
Make sure that geographic coordinates are valid	validate_coordinates
Validate ERA5 variable names	validate_era5_variables
Calculate vapor pressure from dewpoint temperature	vapor_pressure_from_dewpoint
PascalCase Aliases	ERA5ifyGeojson era5ify_geojson varunayan-aliases
Show the overlap of grid points and polygons	visualize_grid_overlap
Warm nights	warm_nights
Wet Bulb Globe Temperature	wbgt
Calculate WBGT from dewpoint	wbgt_from_dewpoint
Outdoor Wet Bulb Globe Temperature (Liljegren method)	wbgt_liljegren
Heat stress risk categories	wbgt_risk_category
Calculate shade/indoor Wet Bulb Globe Temperature (ISO 7243)	wbgt_shade
Calculate WBGT (Wet Bulb Globe Temperature)	wbgt_simple
Calculate wet bulb temperature from dewpoint	wet_bulb_from_dewpoint
Calculate wet bulb temperature	wet_bulb_temperature

Package: varunayan 0.4.0

varunayan: Download and Process 'ERA5', IMD, 'HadEX3' and 'CRU TS' Data

Citation

Readme and manuals

Help Manual

Usage by other packages (reverse dependencies)