agricolae (version 1.0-1)

audpc.rel: Calculates the relative AUDPC of a table

Description

Area under the curve of the progress of the disease. The relative AUDPC does not have units and is used when joint analysis of varieties is made in different environment where the dates and the intervals of evaluation change. The relative AUDPC is the value between the absolute AUDPC and the total area of evaluation multiplied by the time interval of evaluation in percent.

Usage

audpc.rel(evaluation, dates)

Arguments

evaluation

Table of evaluations

dates

Dates of evaluation

Value

• evaluation
  data frame
• dates
  a numeric vector

Details

If evaluated from day 14 to day 28 is 14 days of evaluation, then the total area of evaluation will be: 100x14=1400 If AUDPC = 1015 then AUDPC.rel = 1015/1400 = 0.725.

See Also

audpc.abs

Examples

library(agricolae)
# Example 1
dates<-c(14,21,28)
evaluation<-data.frame(E1=40,E2=80,E3=90)
# Audpc relative
relative<-audpc.rel(evaluation,dates)
print(relative)
rm(relative, evaluation,dates)
# Example 2
data(disease)
attach(disease)
dates<-c(1,2,3)
evaluation<-disease[,c(4,5,6)]
# Audpc relative
audpc<-audpc.rel(evaluation,dates)
# data for analysis.
data2<-data.frame(disease,relative=audpc)
# correlation between the yield and the AUDPC
attach(data2)
cor.vector(yield, relative, method="kendall")
rm(audpc, dates, data2)