Table 2.
Distribution of papers published between 1994 and June 2017 (n=142) in the four different categories (and, where applicable, levels within category) of Big Data analytics
| Number of papers | |||
|---|---|---|---|
| Categories | Level | Level | Category |
| Supervised learning | 134 | ||
| Regression | 48 | ||
| Classification | 86 | ||
| Unsupervised learning | 19 | ||
| Clustering | 7 | ||
| Dimensionality reduction | 12 | ||
| Semi-supervised classification | 1 | ||
| Reinforcement learning | 0 | ||
| Total 1 | 154 | ||
1
The total exceeds the number of unique papers used in the review (n=142) since some papers cover more than one main category of level of Big Data analytics.