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Table of Contents Appendix Exercises Mixtures of Wines	Index
See also: PCA, Survey of Exercises

Exercise
Detection of mixtures of two different wines by PCA

The following exercise shows the effects of mixtures in the PCA plot. Use the data set WINES_TWOBRANDS and use theto perform your experiments.

How to proceed:

• use the samples "OLO1773" and "ERA2478" and create 9 mixtures with different ratios of both samples (i.e. 10/90 %, 20/80 %, .... of them); therefore,
• resize the data matrix to make room for an extra 9 rows
• write a math script to create the mixtures
• now look at the principal components plot

Additional task: blend several wines (not only two) and check the results in the principal components plot.
 

Last Update: 2005-Jän-25