Figure 9
From: Free-hand gas identification based on transfer function ratios without gas flow control
Accuracies for training and test datasets plotted against regularization parameter C; the datasets were generated through the analysis methods based on (a) TFR, (b) AR model, and (c) FFT. Scatter plots of PCA from the datasets based on (d) TFR, (e) AR model, and (f) FFT. Yellow, red, blue, and orange correspond to ethanol, water, heptane, and ethyl acetate, respectively. Circle and square markers represent the m-sequence pseudorandom sequence and the rectangular sequence, respectively.
