DSI2: Calculate the Disease severity Index (DSI) (frequency of each...

In r4pde: Companion to R for Plant Disease Epidemiology Book

Calculate the Disease severity Index (DSI) (frequency of each class)

Description

This function calculates the Disease Severity Index (DSI) given a vector of classes, a vector of frequencies, and a maximum possible class value. The DSI is calculated as a weighted sum of class values, where each class is multiplied by its corresponding frequency, then divided by the product of the total frequency and maximum class value, and finally multiplied by 100 to get a percentage.

Usage

DSI2(class, freq, max)

Arguments

class	A numeric vector representing the classes.
freq	A numeric vector representing the frequency of each class. Must be the same length as 'class'.
max	A numeric value representing the maximum possible class value.

Value

Returns a single numeric value representing the DSI.

See Also

Other Disease quantification: CompMuCens(), DSI()

Examples

DSI2(c(0, 1, 2, 3, 4), c(2, 0, 5, 0, 5), 4)

r4pde documentation built on July 2, 2025, 5:09 p.m.