MovieRecommender: EvaluateModel code

Program.cs

        public static void EvaluateModel(MLContext mlContext, IDataView testDataView, ITransformer model)
        {
            Console.WriteLine("=============== Evaluating the model ===============");
            var prediction = model.Transform(testDataView);

            var metrics = mlContext.Regression.Evaluate(prediction, labelColumnName: "Label", scoreColumnName: "Score");

            Console.WriteLine("Root Mean Squared Error : " + metrics.RootMeanSquaredError.ToString());
            Console.WriteLine("RSquared: " + metrics.RSquared.ToString());
        }