Fig 7.

Comparison of malignant nodules and benign nodules distributions for the three additional features selected in the SVM-LASSO model with respect to the ANN model: StandardDeviationOfInertia (left panels), StandardDeviationOfShortRunEmphasis (central panels) and StandardDeviationOfEnergy (right panels). Panels on the top are related to the cross-validation set while panels on the bottom represent distributions of external validation-set features. For each pair of distributions p-values resulted from the Wilcoxon rank sum test are reported (alpha=5%).