varcomp function

Variance Components

This function estimates the variance components for ANOVA.

varcomp(a1, a2, f1, f2)

Arguments

• a1, a2: analytical duplicates
• f1, f2: field duplicates

Returns

• 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.

Author(s)

Peter Filzmoser <P.Filzmoser@tuwien.ac.at > http://cstat.tuwien.ac.at/filz/

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])