Statistical Bar Chart

This experiment shows the results of some classifier algorithm. Each bar corresponds to a different algorithm. In particular this bar chart tries to visualise and make comparable the four statistical numbers of binary classification: True Positive (TP), True Negative (TN), False Positive (FP) and False Negative (FN). Each of these components are represented in the diagram using bars with different color and height:

• TP are green and high;
• TN are red and high;
• FP are green and small;
• FN are red and small.

Moreover, it shows the accuracy of the algorithms as the union of the high bars (TP + TN). The first bar in the diagram represents the ideal algorithm in which there are only TP and TN and no FP and FN.