Collection of related numerical data held in a structured format within a database, consisting of columns, and rows:
| Var1 | Var2 | ... | VarK | |
|---|---|---|---|---|
| 1 | 25 | -0.3 | ... | 2.78 |
| 2 | 12.9 | 320 | ... | 0.75 |
| ... | ... | ... | ... | ... |
| N | 32.45 | 5.17 | ... | -0.001 |
It may have the columns split into the Input and Output subsets of variables, usually for the purposes of regression analysis:
| Inputs | Outputs | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| In1 | In2 | ... | InK | Out1 | Out2 | ... | OutM | ||
| 1 | 25 | -0.3 | ... | 2.78 | 1 | -15.1 | ... | 23.897 | |
| 2 | 12.9 | 320 | ... | 0.75 | 4 | 0.45 | ... | 0.265 | |
| ... | ... | ... | ... | ... | ... | ... | ... | ... | |
| N | 32.45 | 5.17 | ... | -0.001 | 3 | 46.17 | ... | -89 | |