fp_model: A fractional polynomial model.

In serosv: Model Infectious Disease Parameters from Serosurveys

A fractional polynomial model.

Description

Refers to section 6.2.

Usage

fp_model(age, p, pos = NULL, tot = NULL, status = NULL, link = "logit")

Arguments

age	the age vector.
p	the powers of the predictor.
pos	the positive count vector (optional if status is provided).
tot	the total count vector (optional if status is provided).
status	the serostatus vector (optional if pos & tot are provided).
link	the link function for model. Defaulted to "logit".

Value

a list of class fp_model with 5 items

datatype	type of data used for fitting model (aggregated or linelisting)
df	the dataframe used for fitting the model
info	a fitted glm model
sp	seroprevalence
foi	force of infection

See Also

[stats::glm()] for more information on glm object

Examples

df <- hav_be_1993_1994
model <- fp_model(
  df$age, pos = df$pos, tot = df$tot,
  p=c(1.5, 1.6), link="cloglog")
plot(model)

serosv documentation built on Oct. 18, 2024, 5:07 p.m.