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Table 1 The 5 groups of the example 1

From: Using n-gram analysis to cluster heartbeat signals

No. Group Subjects Description Source
1. Congestive Heart Failure (CHF) 43 15 females and 28 males, average age 55.5 years. It takes 16 to 24 hours for each sample (around 75,000 RRI). BIDMC Congestive Heart Failure Database [19]
2. Atrial Fibrillation (AF) 9 Takes only 2 hours for recording (around 12,000 RRI). Albert C.-C. Yang
3. Healthy Young (HY) 20 10 females and 10 males, average age 25.9 years. It takes 2 hours for each sample (around 7,100 RRI). Fantasia Database [20, 21]
4. Healthy Elderly (HE) 20 10 females and 10 males, average age 74.5 years. It takes 2 hours for each sample (around 7,200 RRI).
5. White Noise (WNU) 50 Uniform distribution. It takes 6 hours for each sample (around 15,000 RRI). Artificially generated
  Total 142