UVdose (version 0.1.1)

annual_uve: Annual erythemal UV

Description

This function extracts mean or cumulative erythemal UV dose at a given date and geographical location (longitude and latitude), over one year prior to the index date.

Usage

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

Value

A numeric vector of mean or cumulative annual erythemal UV dose estimates.

Arguments

data

data frame containing sample IDs, date, longitude, and latitude

date

A date vector, usually date of assessment or recruitment.

longitude

A numeric vector of longitude values.

latitude

A numeric vector of latitude values.

temis_path

Path to TEMIS UV files downloaded using temis_uvdec. 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".

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))
uve_example <- system.file("extdata", "uve_example", package="UVdose")
annual_uve(mysample, date, longitude, latitude, temis_path=uve_example)