annual_uvb: Annual UVB

In UVdose: Estimate Ambient UV Dose from Location and Date Info

Annual UVB

Description

This function extracts vitamin D-effective UVB dose (i.e. UVB wavelenghts that can induce vitamin D synthesis in human skin) on a particular date and geographical location (longitude and latitude), over one year prior to the index date.

Usage

annual_uvb(
  data,
  date,
  longitude,
  latitude,
  temis_path = getwd(),
  type = "cumulative",
  region = "europe"
)

Arguments

data	data frame containing sample IDs, date, longitude, and latitude
date	date vector, usually date of assessment or recruitment.
longitude	numeric vector of longitude values.
latitude	numeric vector of latitude values.
temis_path	path to TEMIS UV files downloaded using temis_uvdvc. Default is current directory.
type	Type of annual dose to be calculated, cumulative (default) or mean.
region	Region of TEMIS data required, options are "europe" (default) or "world".

Value

A numeric vector of mean or cumulative annual vitamin D UVB dose estimates.

Examples

#uses sample TEMIS file
mysample <- data.frame(id = c("id000016"),
        date = as.Date(c("2010-08-04")),
        longitude = c(-2.10),
        latitude = c(50.5))
uvb_example <- system.file("extdata", "uvb_example", package="UVdose")
annual_uvb(mysample, date, longitude, latitude, temis_path=uvb_example)

UVdose documentation built on Nov. 5, 2025, 7:38 p.m.