Update TaxiFare to ML.NET v1.0.0 (#872)

Author: JRAlexander

machine-learning/tutorials/TaxiFarePrediction/Program.cs

@@ -31,7 +31,7 @@ static void Main(string[] args)
             // </Snippet14>
 
             // <Snippet20>
-            TestSinglePrediction(mlContext);
+            TestSinglePrediction(mlContext, model);
             // </Snippet20>
         }
 
@@ -66,7 +66,6 @@ public static ITransformer Train(MLContext mlContext, string dataPath)
             Console.WriteLine("=============== End of training ===============");
             Console.WriteLine();
             // <Snippet12>
-            SaveModelAsFile(mlContext, dataView.Schema, model);
             return model;
             // </Snippet12>
         }
@@ -98,17 +97,12 @@ private static void Evaluate(MLContext mlContext, ITransformer model)
 
         }
 
-        private static void TestSinglePrediction(MLContext mlContext)
+        private static void TestSinglePrediction(MLContext mlContext, ITransformer model)
         {
-            //load the model
-            // <Snippet21>
-            ITransformer loadedModel = mlContext.Model.Load(_modelPath, out var modelInputSchema);
-            // </Snippet21>
-
             //Prediction test
             // Create prediction function and make prediction.
             // <Snippet22>
-            var predictionFunction = mlContext.Model.CreatePredictionEngine<TaxiTrip, TaxiTripFarePrediction>(loadedModel);
+            var predictionFunction = mlContext.Model.CreatePredictionEngine<TaxiTrip, TaxiTripFarePrediction>(model);
             // </Snippet22>
             //Sample: 
             //vendor_id,rate_code,passenger_count,trip_time_in_secs,trip_distance,payment_type,fare_amount
@@ -134,14 +128,5 @@ private static void TestSinglePrediction(MLContext mlContext)
             Console.WriteLine($"**********************************************************************");
             // </Snippet25>
         }
-
-        private static void SaveModelAsFile(MLContext mlContext,DataViewSchema dataViewSchema, ITransformer model)
-        {
-            // <Snippet13> 
-            mlContext.Model.Save(model, dataViewSchema, _modelPath);
-            // </Snippet13>
-
-            Console.WriteLine("The model is saved to {0}", _modelPath);
-        }
     }
 }

machine-learning/tutorials/TaxiFarePrediction/TaxiFarePrediction.csproj

@@ -2,16 +2,16 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <TargetFramework>netcoreapp2.2</TargetFramework>
   </PropertyGroup>
 
   <PropertyGroup>
     <LangVersion>7.1</LangVersion>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.ML" Version="1.0.0-preview" />
-    <PackageReference Include="Microsoft.ML.FastTree" Version="1.0.0-preview" />
+    <PackageReference Include="Microsoft.ML" Version="1.0.0" />
+    <PackageReference Include="Microsoft.ML.FastTree" Version="1.0.0" />
   </ItemGroup>
 
   <ItemGroup>