Name: varunayanR
Author: Saket Choudhary

ERA5 data functions

Download ERA5 reanalysis data from Copernicus climate data store

ERA5ifyBbox() era5ify_bbox(): ERA5 data download and processing for bounding box regions
ERA5ifyGeojson() era5ify_geojson(): PascalCase Aliases
ERA5ifyPoint() era5ify_point(): ERA5 data download and processing for point locations
SetupCdsCredentials() setup_cds_credentials(): ERA5 data download functions using ecmwfr Set up CDS credentials for ERA5 data access

IMD data functions

Download gridded climate data from Indian Meteorological Department

IMDRainfallBbox() imd_rainfall_bbox(): IMD data download and processing for custom regions Download and process IMD rainfall data for a bounding box
IMDRainfallGeojson() imd_rainfall_geojson(): Download and process IMD rainfall data for a GeoJSON region
IMDTemperatureBbox() imd_temperature_bbox(): Download and process IMD temperature data for a bounding box
IMDTemperatureGeojson() imd_temperature_geojson(): Download and process IMD temperature data for a GeoJSON region

Variable discovery

Search and explore available climate variables

SearchVariable() search_variable(): Search and description functions for ERA5 variables Search for ERA5 variables by keyword
DescribeVariables() describe_variables(): Describe ERA5 variables in detail
ListAvailableVariables() list_available_variables(): List all available variables for a dataset type

Cache management

Manage downloaded data cache

ShowCacheInfo() show_cache_info(): Show cache contents and statistics
ClearCache() clear_cache(): Clear cache

All other functions

GetERA5DailyClimate() get_era5_daily_climate(): Download daily ERA5 climate data
GetERA5DailyHeatIndexData() get_era5_daily_heat_index_data() GetERA5DailyHeatData() get_era5_daily_heat_data(): Download ERA5 data and calculate heat stress indices
GetERA5DailyHumidity() get_era5_daily_humidity(): Download daily ERA5 humidity data
GetERA5DailyTemperature() get_era5_daily_temperature(): Download daily ERA5 temperature data
GetERA5DailyWetBulb() get_era5_daily_wet_bulb(): Download daily ERA5 wet bulb temperature data
GetERA5DailyWind() get_era5_daily_wind(): Download daily ERA5 wind data
GetERA5MonthlyHeatIndexData() get_era5_monthly_heat_index_data() GetERA5MonthlyHeatData() get_era5_monthly_heat_data(): Get monthly ERA5 heat stress index data
aggregate_by_frequency(): Aggregate data by temporal frequency
aggregate_imd_by_frequency(): Aggregate IMD data by temporal frequency
aggregate_to_polygons(): Spatial utilities for aggregating gridded data to polygons Aggregate gridded data to polygon regions
cache_stats(): Get cache statistics
calc_heat_indices(): Calculate all heat stress indices
categorize_variables(): Categorize variables by aggregation method
check_grid_coverage(): Check grid coverage statistics for polygons
CheckSystemReadiness() check_system_readiness(): Check system readiness for varunayan operations
cleanup_temp_files(): Clean up temporary files matching pattern
ClearCache() clear_cache(): Clear cache
clear_timings(): Clear all timing data
combine_netcdf_files(): Combine multiple NetCDF files into single data.frame
compare_grids(): Compare multiple grids
convert_to_geojson(): Convert data to GeoJSON format
create_geojson_from_bbox(): Create GeoJSON from bounding box coordinates
create_temp_geojson_file(): Create temporary GeoJSON file
create_temporal_chunks(): Apply temporal chunking for large date ranges
DescribeVariables() describe_variables(): Describe ERA5 variables in detail
download_era5_pressure(): Download ERA5 pressure-level data using ecmwfr
download_era5_single(): Download ERA5 single-level data using ecmwfr
download_imd_rainfall(): IMD data download functions
download_imd_temperature(): Download IMD gridded temperature data
ensure_output_dir(): Create output directory if it doesn't exist
ERA5ifyBbox() era5ify_bbox(): ERA5 data download and processing for bounding box regions
ERA5ifyGeojson() era5ify_geojson(): PascalCase Aliases
ERA5ifyPoint() era5ify_point(): ERA5 data download and processing for point locations
exclude_cols: Columns to exclude from aggregation
extract_point_data(): Extract data for specific point location (nearest neighbor)
filter_dataframe_by_geojson(): Filter data.frame by GeoJSON polygon (optimized)
filter_imd_by_bbox(): Filter IMD data by spatial boundaries
filter_imd_by_geojson(): Filter IMD data by GeoJSON polygon
filter_netcdf_by_bbox(): Filter NetCDF data by spatial boundaries (bounding box)
filter_netcdf_by_geojson(): Filter NetCDF data by GeoJSON polygon
format_date_range(): Format date range for CDS API requests
format_pressure_levels(): Convert pressure levels to character format required by CDS API
get_available_datasets(): Get available dataset types
GetAvailablePressureLevels() get_available_pressure_levels(): Get standard pressure levels available in ERA5
get_bbox_from_sf(): Get bounding box from sf object
GetCacheDir() get_cache_dir(): Cache management for downloaded NetCDF files
get_cds_credentials(): Get CDS API credentials from multiple sources
get_imd_grid_specs(): Get IMD grid specifications
GetPackageInfo() get_package_info(): Get package version information
get_pressure_level_variable_names(): Get all valid pressure-level variable names
get_pressure_level_variables(): Get pressure-level variables dataset
get_single_level_variable_names(): Get all valid single-level variable names
get_single_level_variables(): Get single-level variables dataset
get_time_values(): Get time values based on frequency
get_timings(): Get all recorded timings
heat_index(): Calculate heat index (apparent temperature)
heat_index_from_dewpoint(): Calculate heat index from dewpoint
heat_index_risk_category(): Heat index risk categories
heat_stress: heat stress index calculations
humidex(): Calculate humidex (Canadian heat index)
IMDRainfallBbox() imd_rainfall_bbox(): IMD data download and processing for custom regions Download and process IMD rainfall data for a bounding box
IMDRainfallGeojson() imd_rainfall_geojson(): Download and process IMD rainfall data for a GeoJSON region
IMDTemperatureBbox() imd_temperature_bbox(): Download and process IMD temperature data for a bounding box
IMDTemperatureGeojson() imd_temperature_geojson(): Download and process IMD temperature data for a GeoJSON region
is_max_var(): Check if a variable should use maximum
is_min_var(): Check if a variable should use minimum
is_rate_var(): Check if a variable is a rate variable
is_sum_var(): Check if a variable should be summed
is_valid_geojson(): Check if data is valid GeoJSON
ListAvailableVariables() list_available_variables(): List all available variables for a dataset type
list_cache(): List cached files
list_imd_datasets(): List available IMD datasets
max_vars: Variables that should use maximum aggregation
mean_radiant_temperature(): Estimate mean radiant temperature
min_vars: Variables that should use minimum aggregation
parse_date_flexible(): Parse date string flexibly
PopulateSampleCache() populate_sample_cache(): Populate cache with sample IMD data
print_timing_summary(): Print timing summary
process_imd_files(): Process multiple IMD files
process_netcdf_to_dataframe(): NetCDF processing functions for ERA5 data Process NetCDF file and extract data as data.frame
rate_vars: Rate variables that should be averaged
read_cdsapirc(): Read CDS API credentials from ~/.cdsapirc file
read_imd_rainfall(): Read IMD NetCDF rainfall file
read_imd_temperature(): IMD data processing functions Read IMD binary temperature file
read_netcdf_with_ncdf4(): Read NetCDF using ncdf4 as fallback when stars fails
relative_humidity_from_dewpoint(): Calculate relative humidity from temperature and dewpoint
SearchVariable() search_variable(): Search and description functions for ERA5 variables Search for ERA5 variables by keyword
SetupCdsCredentials() setup_cds_credentials(): ERA5 data download functions using ecmwfr Set up CDS credentials for ERA5 data access
ShowCacheInfo() show_cache_info(): Show cache contents and statistics
sum_vars: Variables that should be summed over time
time_operation(): Time an operation and log the duration
utci(): Calculate UTCI (Universal Thermal Climate Index)
utci_category(): UTCI thermal stress categories
utci_sparse(): Calculate UTCI using sparse regression approximation
validate_bbox(): Validate bounding box coordinates
validate_coordinates(): Validate geographic coordinates
validate_era5_variables(): Validate ERA5 variable names
vapor_pressure_from_dewpoint(): Calculate vapor pressure from dewpoint temperature
variable_lists: Variable lists for ERA5 data aggregation
varunayan-utils: Utility functions for Varunayan R package
visualize_grid_overlap(): Visualize grid-polygon overlap
wbgt_from_dewpoint(): Calculate WBGT from dewpoint
wbgt_risk_category(): heat stress risk categories
wbgt_simple(): Calculate WBGT (Wet Bulb Globe Temperature)
wet_bulb_from_dewpoint(): Calculate wet bulb temperature from dewpoint
wet_bulb_temperature(): Calculate wet bulb temperature

Package index

ERA5 data functions

IMD data functions

Variable discovery

Cache management

All other functions