Quantitative Analysis of a Weak Correlation between Complicated Data on the Basis of Principal Component Analysis

Figure 5

Using the samples of GCQ as an example, the results of 2-dimensional confidence ellipse analysis of climate, altitude, and chemical compositions of tobacco leaves were generated. (a), (b), (c) The results of 2-dimensional confidence ellipse analysis by using the data of climate, altitude, and chemical compositions of tobacco leaves. In the three plots, the red ellipse is constructed by using the samples of GCQ, and the blue one is constructed by using all samples of other locations. Each green data in the red ellipse denotes a sample of GCQ, and the red point in the area denotes the samples of other areas. Correspondingly, the samples of GCQ excluding in this ellipse are shown in red color, and samples of other areas are shown in blue color.

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