Axis APIs - Value Axis vs. Category Axis
SciChart 2D Android Features several axis types which could be Value or Category. All inherit from AxisBase<T>. So what's the difference between Value and Category Axes? An explanation is given below.
Given the data:
| Age (X-Axis) | Cats | Dogs | Fish |
|---|---|---|---|
| 1 | 7 | 7 | 8 |
| 9 | 6 | 5 | 7 |
| 10 | 5 | 4 | 3 |
| 20 | 4 | 3 | 2 |
A Value X-Axis and Category X-Axis would display the data differently:
| Category X-Axis | Value X-Axis |
|---|---|
 |
 |
The fundamental difference is a Value-Axis uses the X-Value to compute distance on the XAxis, whereas a Category-Axis uses the X-Index. Value-Axis are primarily used in scientific software where Category–Axis are typically used in financial software (e.g. stock charts).
SciChart features both Value-Axis and Category-Axis types.
| Axis Type | Value or Category Axis |
|---|---|
| NumericAxis | Value Axis |
| LogarithmicNumericAxis | Value Axis |
| DateAxis | Value Axis |
| CategoryDateAxis | Category Axis |
For more information, refer to the Axis APIs article.