A valid approach to the interpretation of resin compositional data is through the analysis of ratios of proportions of a composition, which have the essential property of being invariant under re-scaling. Transformation of the proportional data to a logratio data set allows the properties of the lognormal distribution to be employed; the logratio transformation removes the constraint of summation to unity, and provides an interpretable covariance structure. The logratio forms a multivariate data set amenable to analysis using standard techniques, which can be demonstrated for a sample set of resin compositional data.
Silvae Genetica (1993) 42 (6) 340-350
Analysis of resin compositional data