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# init(inputMetaParameterDefinition:envelope:)

Creates a specification for a metaparameter that the app plots on a graph defined by the given set of curves.

```
init(inputMetaParameterDefinition: PHASENumberMetaParameterDefinition, envelope: PHASEEnvelope)
```

## Parameters

`inputMetaParameterDefinition`

A metaparameter that contains an input value.

`envelope`

A set of curves that graph the input value.

---

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