Assessment of Ripening Degree of Avocado by Electrical Impedance Spectroscopy and Support Vector Machine

Figure 5

Principal component analysis (PCA2 vs. PCA1) over EIS responses: (a) impedance magnitude, (b) negative phase angle, (c) real part of impedance, and (d) imaginary part of impedance.

(a)

(b)

(c)

(d)