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
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.