StatDA (version 1.5)

varcomp: Variance Components

Description

This function estimates the variance components for ANOVA.

Usage

varcomp(a1, a2, f1, f2)

Arguments

a1, a2

analytical duplicates

f1, f2

field duplicates

Value

• pct.regional
  percentage of regional variability
• pct.site
  percentage at site variability
• pct.analytical
  percentage of analytical variability
• pval
  p-value

References

C. Reimann, P. Filzmoser, R.G. Garrett, and R. Dutter: Statistical Data Analysis Explained. Applied Environmental Statistics with R. John Wiley and Sons, Chichester, 2008.

Examples

# field duplicates:
data(CHorFieldDUP)
xfield1=CHorFieldDUP[,5:98]
xfield2=CHorFieldDUP[,99:192]

# anaytical duplicates:
data(CHorANADUP)
xanal1=CHorANADUP[,3:96]
xanal2=CHorANADUP[,97:190]

varcomp(xanal1[,1],xanal2[,1],xfield1[,1],xfield2[,1])