IMLFeatureProvider Interface

Definition

[Foundation.Protocol(Name="MLFeatureProvider", WrapperType=typeof(CoreML.MLFeatureProviderWrapper))]
[Foundation.ProtocolMember(IsProperty=false, IsRequired=true, IsStatic=false, Name="GetFeatureValue", ParameterByRef=new System.Boolean[] { false }, ParameterType=new System.Type[] { typeof(System.String) }, ReturnType=typeof(CoreML.MLFeatureValue), Selector="featureValueForName:")]
[Foundation.ProtocolMember(ArgumentSemantic=ObjCRuntime.ArgumentSemantic.None, GetterSelector="featureNames", IsProperty=true, IsRequired=true, IsStatic=false, Name="FeatureNames", PropertyType=typeof(Foundation.NSSet<Foundation.NSString>), Selector="featureNames")]
public interface IMLFeatureProvider : IDisposable, ObjCRuntime.INativeObject

[<Foundation.Protocol(Name="MLFeatureProvider", WrapperType=typeof(CoreML.MLFeatureProviderWrapper))>]
[<Foundation.ProtocolMember(IsProperty=false, IsRequired=true, IsStatic=false, Name="GetFeatureValue", ParameterByRef=new System.Boolean[] { false }, ParameterType=new System.Type[] { typeof(System.String) }, ReturnType=typeof(CoreML.MLFeatureValue), Selector="featureValueForName:")>]
[<Foundation.ProtocolMember(ArgumentSemantic=ObjCRuntime.ArgumentSemantic.None, GetterSelector="featureNames", IsProperty=true, IsRequired=true, IsStatic=false, Name="FeatureNames", PropertyType=typeof(Foundation.NSSet<Foundation.NSString>), Selector="featureNames")>]
type IMLFeatureProvider = interface
    interface INativeObject
    interface IDisposable

Derived

CoreML.MLDictionaryFeatureProvider

Attributes

ProtocolAttribute ProtocolMemberAttribute

Implements

INativeObject IDisposable

Remarks

CoreML does not directly read and write system-native data. Rather it uses this class to map strings to values for the inputs and outputs of the MLModel object.

The following example shows a IMLFeatureProvider that provides 3 inputs variables, all of type double:

public class MarsHabitatPricerInput : NSObject, IMLFeatureProvider
{
	public double SolarPanels { get; set; }
	public double Greenhouses { get; set; }
	public double Size { get; set; }

	public NSSet<NSString> FeatureNames => new NSSet<NSString>(new NSString("solarPanels"), new NSString("greenhouses"), new NSString("size"));

	public MLFeatureValue GetFeatureValue(string featureName)
	{
		switch (featureName)
		{
			case "solarPanels":
				return MLFeatureValue.Create(SolarPanels);
			case "greenhouses":
				return MLFeatureValue.Create(Greenhouses);
			case "size":
				return MLFeatureValue.Create(Size);
			default:
				return MLFeatureValue.Create(0);
		}
	}
}