Data multidimensional analysis regarding Danube water quality over the period 1990-1996

Systematic and rational studies concerning the water quality of the Danube river were performed for the period 1990-1996. Cluster analysis and princip al component analysis enabled more rational and objective estimation and co mparison of the samples and characteristics of water quality as determined by traditional statistical methods. If also afforded a useful graphical too l, because scatterplots of scores and loadings on to a plane will have the effect of separating samples and characteristics from each other more effec tively, leading to finding trends, relationship (speciation) or outliers.