From e1c61de5a0e693e2f24a1c4a10336e2a1c4563cb Mon Sep 17 00:00:00 2001 From: Naeem Model Date: Wed, 10 Jan 2024 14:50:22 +0000 Subject: Rename ID and IDEA --- man/id.Rd | 47 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 man/id.Rd (limited to 'man/id.Rd') diff --git a/man/id.Rd b/man/id.Rd new file mode 100644 index 0000000..1d32c50 --- /dev/null +++ b/man/id.Rd @@ -0,0 +1,47 @@ +% Generated by roxygen2: do not edit by hand +% Please edit documentation in R/ID.R +\name{ID} +\alias{ID} +\title{ID method} +\usage{ +ID(NT, mu) +} +\arguments{ +\item{NT}{Vector of case counts.} + +\item{mu}{Mean of the serial distribution. This needs to match case counts +in time units. For example, if case counts are weekly and the +serial distribution has a mean of seven days, then \code{mu} should +be set to one. If case counts are daily and the serial distribution +has a mean of seven days, then \code{mu} should be set to seven.} +} +\value{ +\code{ID} returns a single value, the estimate of R0. +} +\description{ +This function implements a least squares estimation method of R0 due to +Fisman et al. (PloS One, 2013). See details for implementation notes. +} +\details{ +The method is based on a straightforward incidence decay model. The estimate +of R0 is the value which minimizes the sum of squares between observed case +counts and cases counts 'expected' under the model. + +This method is based on an approximation of the SIR model, which is most +valid at the beginning of an epidemic. The method assumes that the mean of +the serial distribution (sometimes called the serial interval) is known. The +final estimate can be quite sensitive to this value, so sensitivity testing +is strongly recommended. Users should be careful about units of time (e.g., +are counts observed daily or weekly?) when implementing. +} +\examples{ +# Weekly data: +NT <- c(1, 4, 10, 5, 3, 4, 19, 3, 3, 14, 4) + +# Obtain R0 when the serial distribution has a mean of five days. +ID(NT, mu = 5 / 7) + +# Obtain R0 when the serial distribution has a mean of three days. +ID(NT, mu = 3 / 7) + +} -- cgit v1.2.3