In this post I continue with the unsupervised exploration of oil spectra, which we have seen in previous post ( PCA with “ChemoSpec” – 001).

In the manual “**ChemoSpec:An R Package for Chemometric Analysis of Spectroscopic Data**“, (page 23) there is a brief description about how to get very nice plots to look to our data in the Principal Component Space using the **GGobi software**, and the** rggobi package**.

With the function

> plotScoresG(oils,class)

GGobi opens and let me see the plots in diferent ways. I can see the different PC scores planes, rotate them,…., and to get a better knowledge of the clusters.

**olive samples are yellow and the sunflower oil samples are red.*

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