Figure 7
The three-panel scatter plots are labeled (a), (b), and (c), each showing S H A P interaction effects between pairs of features. In all plots, the horizontal axis represents a binary feature (values 0 or 1), and the vertical axis represents the corresponding S H A P value. Each point represents an observation, and color indicates the interacting feature value, ranging from blue (low, 0.0) to red (high, 1.0), as shown by a vertical color bar. In plot (a), titled “Impact of E 2 and older than 35 on model output”, the horizontal axis is “E 2 underscore 1”, ranging from 0.0 to 1.0 with an interval of 0.02, and the vertical axis is “S H A P value for E 2 underscore 1”, ranging from negative 0.05 to 0.20 with an interval of 0.05. Points at E 2 underscore 1 equal to 0.0 cluster around negative S H A P values from negative 0.07 to negative 0.03, while points at E 2 underscore 1 equal to 1.0 cluster at higher positive S H A P values from 0.10 to 0.22. Color represents “Older than 35 underscore 1”, with both blue and red points present in each cluster. In plot (b), titled “Impact of alteration project type and project cost 250 thousand to 500 thousand on model output”, the horizontal axis is “project type underscore Alteration or rehabilitation”, ranging from 0.0 to 1.0 with an interval of 0.02, and the vertical axis is “S H A P value for project type underscore Alteration or rehabilitation”, ranging from negative 0.03 to 0.02 with an interval of 0.01. Points at project type underscore Alteration or rehabilitation equal to 0.0 cluster around values from negative 0.01 to 0.02, while points at value 1.0 extend more into negative S H A P values, ranging from negative 0.03 to 0.015. Color represents “project cost underscore 250 thousand to 500 thousand”, with both blue and red points distributed across the clusters. In plot (c), titled “Impact of project cost 250 thousand dollars to 500 thousand dollars and E 2 on model output”, the horizontal axis is “project cost underscore 250 thousand to 500 thousand”, ranging from 0.0 to 1.0 with an interval of 0.02, and the vertical axis is “S H A P value for project cost underscore 250 thousand to 500 thousand”, ranging from negative 0.03 to 0.02 with an interval of 0.01. Points at project cost underscore 250 thousand to 500 thousand equal to 0.0, cluster around small positive S H A P values from 0.00 to 0.02, while points at value 1.0 cluster around lower values ranging from negative 0.036 to 0.01. Color represents “E 2 underscore 1”, with blue and red points indicating variation across both clusters. Note: All numerical data values are approximated.SHAP feature dependency plots. Source: Authors’ own work