R/prevalence.R

Defines functions prevalence

Documented in prevalence

prevalence <-
function (obs, event = 1, na.rm = TRUE) {
  # version 1.0
  # calculates the prevalence (proportion of occurrences) of a value (event) in a vector
  # obs: a vector of binary observations (e.g. 1 vs. 0, male vs. female, disease vs. no disease, etc.)
  # event: the value whose prevalence we want to calculate (e.g. 1, "present", etc.)
  if(na.rm) obs <- obs[!is.na(obs)]
  sum(obs == event) / length(obs)
}

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modEvA documentation built on May 29, 2017, 10:47 a.m.