Automatic Nonnutritive Suck Waveform Discrimination and Feature Extraction in Preterm Infants

Figure 5

Results analysis. (a) NeoNNS features distribution between positive (labeled as “1” means ready for oral feed or “0” not ready for oral feed); (b) the pairwise distribution between every two NNS NeoNNS features; (c) a parallel coordinate feature view of our 9 NeoNNS features. The number inside parentheses represents the feature indexes. Green signifies positive (ready to feed) records, and blue is negative (not ready). (d) PCA plot of 3 components (infant feed modes), where red dots are negative (not ready to orally feed), blue signifies positive (ready to orally feed), and yellow is unknown oral feeding readiness.