An Analysis of Audio Features to Develop a Human Activity Recognition Model Using Genetic Algorithms, Random Forests, and Neural Networks

Table 6

Confusion matrix of the RF-based HAR model with 9 features.

	Brew coffee	Cooking	Use microwave oven	No activity	Take a bath	Dish washing	Hand washing	Teeth brushing	Type II error
Brew coffee	218	12	0	1	0	8	1	5	0.110
Cooking	44	74	0	0	8	1	0	5	0.439
Use microwave oven	6	2	34	0	0	0	0	0	0.190
Take a bath	6	3	0	1	399	9	0	10	0.068
Dish washing	3	7	0	0	15	99	1	9	0.261
Hand washing	1	0	0	0	6	4	56	3	0.200
Teeth brushing	12	8	0	0	17	8	1	78	0.371
No activity	2	0	0	11	1	0	0	2	0.313
Type I error	0.253	0.302	0.000	0.154	0.105	0.233	0.051	0.304