Figure 7.

Accuracy of models trained on various subsets of features available for the recursive forward selection method: ALL—all prepared types of features, ALL-G—only features extracted from the conductance, ALL-R—only features extracted from the resistance, and ON, ON-G, ON-R—only features extracted from the gas adsorption part of the response. (a) Data from all sensors are used, (b–g) data from individual sensors are used for model training; sensors are indicated in sub-figures. Individual bars from left to right in each group display values obtained for 5, 10, and 15 features, respectively. Ticks above bars in figures (b–g) indicate the level of model accuracy obtained with all sensor data, as presented in figure (a). Charts (b–g) are ordered such that data from the same type of sensor are presented by row.