Ultraviolet-Visible Spectroscopy and Chemometric Strategy Enable the Classification and Detection of Expired Antimalarial Herbal Medicinal Product in Ghana

Figure 6

SVM class predicted probability for herbal medicinal products for training data HMP1 (a), HMP2 (b), HMP3 (c), HMP4 (d), and HMP5 (e) showing expired samples HMP4X. HMP1—red circles, HMP2—purple squares, HMP3—green diamonds, HMP4—red pentagrams, and HMP5—blue triangles. HMP4X—black triangles. Training and validation data are represented by hollow and filled markers, respectively. The red dashed line represents the discrimination barrier above which samples are positively predicted as designated by the y-axis label.

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