flubase: An internal function for taking the average of previous baseline seasons

Source: R/flubase.R

A simple function will compute the mean by group, across a time unit

flubase(data, outc, time, season)

Arguments

data

A dataset which contains a influenza measure, time and grouping variable, season
outc

Influenza measure
time

A a numeric vector with influenza measure
group

An vector ordered by time which indicates grouping by season '
k

The order of lookback, if k=5 then will take mean of previous 5 groups (i.e. influenza seasons)

Value

a vector of length equal to x