Fig. 2
From: Workplace activity classification from shoe-based movement sensors
Performance of initial random forest classifier in the free-living workplace setting. The numbers in the chart are relative to the total number of samples. This implies that both the accuracy and distribution of observed and predicted samples can be identified from the chart. Y-axis shows the observed activity. X-axis shows the predicted activity from the classification model trained on lab data. The two columns to the right indicate the activity specific sensitivity (the proportion of observed samples classified correctly) and the two rows at the bottom indicates the activity specific specificity (the proportion of classified samples in agreement with the observation)