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# AXNumericDataAxisDescriptor

An object that represents an axis of numerical data.

```
class AXNumericDataAxisDescriptor
```

## Topics

### Creating a numeric data axis

[`init(title:range:gridlinePositions:valueDescriptionProvider:)`](/documentation/Accessibility/AXNumericDataAxisDescriptor/init(title:range:gridlinePositions:valueDescriptionProvider:))

Creates a numeric data axis with the specified title, range, gridline positions,
and value description provider closure.

[`init(attributedTitle:range:gridlinePositions:valueDescriptionProvider:)`](/documentation/Accessibility/AXNumericDataAxisDescriptor/init(attributedTitle:range:gridlinePositions:valueDescriptionProvider:))

Creates a numeric data axis with the specified attributed title, range, gridline
positions, and value description provider closure.

[`initWithTitle:lowerBound:upperBound:gridlinePositions:valueDescriptionProvider:`](/documentation/Accessibility/AXNumericDataAxisDescriptor/initWithTitle:lowerBound:upperBound:gridlinePositions:valueDescriptionProvider:)

Creates a numeric data axis with the specified title, lower bound value, upper bound
value, gridline positions, and value description provider block.

[`initWithAttributedTitle:lowerBound:upperBound:gridlinePositions:valueDescriptionProvider:`](/documentation/Accessibility/AXNumericDataAxisDescriptor/initWithAttributedTitle:lowerBound:upperBound:gridlinePositions:valueDescriptionProvider:)

Creates a numeric data axis with the specified attributed title, lower bound value,
upper bound value, gridline positions, and value description provider block.

### Specifying the value description

[`valueDescriptionProvider`](/documentation/Accessibility/AXNumericDataAxisDescriptor/valueDescriptionProvider)

A description to speak for a particular data value on the axis.

### Configuring the axis scale

[`scaleType`](/documentation/Accessibility/AXNumericDataAxisDescriptor/scaleType-swift.property)

The scale for the axis.

[`AXNumericDataAxisDescriptor.ScaleType`](/documentation/Accessibility/AXNumericDataAxisDescriptor/ScaleType-swift.enum)

Constants that describe the scale of a numeric axis.

### Configuring the axis range

[`range`](/documentation/Accessibility/AXNumericDataAxisDescriptor/range)

A range that defines the minimum and maximum displayable values for the axis.

[`lowerBound`](/documentation/Accessibility/AXNumericDataAxisDescriptor/lowerBound)

The minimum displayable value for the axis.

[`upperBound`](/documentation/Accessibility/AXNumericDataAxisDescriptor/upperBound)

The maximum displayable value for the axis.

### Configuring the gridlines

[`gridlinePositions`](/documentation/Accessibility/AXNumericDataAxisDescriptor/gridlinePositions-9z10e)

The positions of the gridlines along the axis.

[`gridlinePositions`](/documentation/Accessibility/AXNumericDataAxisDescriptor/gridlinePositions-5cfmw)

The positions of the gridlines along the axis.


---

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