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. 2009 Jan 22;4(1):e4245. doi: 10.1371/journal.pone.0004245

Figure 7. Canonical plot of musical instruments.

Figure 7

The results of discriminant analysis are shown for the violin and cello of Stradivari, the early period Guarneri violin, the violin of Gand-Bernardel and the viola of Jay. The small ellipses represent the area of 95% confidence; the large ellipses contain 50% of the measurements.