FIGURE 9.

SVM model with polynomial kernel. (A) The contour plot (as shown in our results) illustrate how different feature combinations influence classification. The red and blue regions represent the model's decision areas for mTBI and control groups, respectively. The contour lines show areas where the model is uncertain or where class boundaries lie. The circles are the individual pigs classified into mTBI (red) or control (blue). There were four misclassified cases where some blue points fall into the red region (or vice versa). (B) The confusion matrix helps assess the accuracy and error types of the classifier, showing the balance between correct and incorrect predictions for both classes.