DataTube2 User Guide
This site gives you the initial and necessary information to run DataTube2, a visual mining application devoted to temporal data.
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Table des matières
Loading demo files or your own data
Synchronous and asynchonous temporal formats
DataTube2 considers its own two CSV formats for temporal data:
- The synchronous temporal format is when all data attributes (i.e., variables) were recorded at the same time steps and with the same temporal difference between time steps. Hence, it is a matrix, like in this example:
| Time step | Variable1 | Variable2 |
|---|---|---|
| 2003-09-28 00:00:00 | 10 | 15 |
| 2003-09-29 00:00:00 | 12 | 15 |
| 2003-09-30 00:00:00 | 14 | 12 |
If you use the synchronous format, be sure that the two above conditions are met.
- The asynchronous temporal format considers that data attributes were recorded at any time and independently. This is an “event” type representation, like in this example:
| Time step | Variable name | Value |
|---|---|---|
| 2003-09-28 00:00:00 | Variable1 | 10 |
| 2003-09-29 00:30:00 | Variable1 | 15 |
| 2003-10-01 00:00:00 | Variable1 | 13 |
| 2003-09-29 01:30:00 | Variable2 | 15 |
| 2003-11-01 00:00:00 | Variable1 | 13 |
This array does not need to be sorted.
CSV format for synchronous files: French (separator = ";", decimal =",") or International (separator = ",", decimal = ".")
To begin, let us remind you that the differences between the French CSV format and the International CSV format are the following:
| French CSV format | International CSV format | |
|---|---|---|
| Cell separator | ; | , |
| Decimal separator | , | . |
The DataTube2 synchronous format supports both encodings, and you can specify the French/International encoding by answering “Yes” or “No” in the following window, which is diplayed when you open a file:
CSV format for asynchronous files: International (separator = "TAB", decimal = ".")
The asynchronous format in DataTube2 uses TAB character as separator and “.” for decimals:
Loading and visualizing the demo files
Simple demo files with artificial data are provided in each format (synchronous or asynchronous) and for each CSV encoding (French or international).
DT2-synchronous-small-file-international.csv
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