evi {EVI}

Calculation of the Epidemic Volatility Index

Description

Calculates the relative change in the standard deviation between two consecutive rolling windows.

Usage

evi(rollsd)

Arguments

rollsd

numeric vector - returned and stored as roll from the rollsd() function.

Examples

data("Italy")
cases = mova(cases=Italy$Cases)
roll = rollsd(cases=cases, lag_t=7)
ev = evi(rollsd=roll)