Fig. 6 | Scientific Reports

Fig. 6

From: A first report of Biomphalaria pfeifferi in the Lower Shire Valley, Southern Malawi, a major intermediate snail host species for intestinal schistosomiasis

Fig. 6

The minimal depth plot indicates the impact of the explanatory variables on the predictive ability of the RF model. Lower values indicate the most important variables in determining the decision boundary relative to the number of trees. Elevation, TDS, conductivity, temperature and pH contributed to the decision trees when 150, 100, 110, 100, and 10 trees were split in the ensemble, respectively. Noticeably, from >200 trees onwards, pH and temperature were not selected for splitting in the classification trees. Note that the mean of the distribution is marked by a vertical bar with a value label on it (the scale for it is different than for the rest of the plot), and the scale of the X axis goes from zero to the maximum number of trees in which any variable was used for splitting.

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