<!--
{
  "availability" : [
    "iOS: 16.0.0 -",
    "iPadOS: 16.0.0 -",
    "macCatalyst: 16.0.0 -",
    "macOS: 13.0.0 -",
    "tvOS: 16.0.0 -",
    "visionOS: 1.0.0 -",
    "watchOS: 9.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "Charts",
  "identifier" : "/documentation/Charts/InterpolationMethod/catmullRom(alpha:)",
  "metadataVersion" : "0.1.0",
  "role" : "Type Method",
  "symbol" : {
    "kind" : "Type Method",
    "modules" : [
      "Swift Charts"
    ],
    "preciseIdentifier" : "s:6Charts19InterpolationMethodV10catmullRom5alphaAC14CoreFoundation7CGFloatV_tFZ"
  },
  "title" : "catmullRom(alpha:)"
}
-->

# catmullRom(alpha:)

Interpolate data points with Catmull-Rom spline, using the given alpha
parameter.

```
static func catmullRom(alpha: CGFloat) -> InterpolationMethod
```

## Parameters

`alpha`

A parameter for the Catmull-Rom spline.
Use 0 for a uniform spline, 0.5 for the centripetal spline,
and 1.0 for the chordal spline.

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)