public TaxiTripFarePrediction GetFarePrediction(TaxiTrip trip)
{
var predictionFunction = mlContext.Model.CreatePredictionEngine <TaxiTrip, TaxiTripFarePrediction>(dataTransformer);
TaxiTripFarePrediction prediction = predictionFunction.Predict(trip);
return(prediction);
}
static async Task Main(string[] args)
{
PredictionModel <TaxiTrip, TaxiTripFarePrediction> model = await Train();
Evaluate(model);
TaxiTripFarePrediction prediction = model.Predict(TestTrips.Trip1);
Console.WriteLine("Predicted fare: {0}, actual fare: 29.5", prediction.FareAmount);
}
public async Task <IActionResult> Run(
[HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = "PredictTaxiFare")] HttpRequest req)
{
IActionResult returnValue = null;
string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
var input = JsonConvert.DeserializeObject <TaxiTrip>(requestBody);
// Make Prediction
TaxiTripFarePrediction prediction = _predictionEnginePool.Predict(
modelName: "TaxiTripModel",
example: input);
var insertedPrediction = new TaxiTripInsertObject
{
Id = Guid.NewGuid().ToString(),
VendorId = input.VendorId,
RateCode = input.RateCode,
PassengerCount = input.PassengerCount,
TripTime = input.TripTime,
TripDistance = input.TripDistance,
PaymentType = input.PaymentType,
FareAmount = input.FareAmount,
PredictedFareAmount = prediction.FareAmount
};
try
{
ItemResponse <TaxiTripInsertObject> predictionResponse = await _container.CreateItemAsync(
insertedPrediction,
new PartitionKey(insertedPrediction.VendorId));
returnValue = new OkObjectResult(predictionResponse);
}
catch (Exception ex)
{
_logger.LogError($"Inserting prediction failed: Exception thrown: {ex.Message}");
returnValue = new StatusCodeResult(StatusCodes.Status500InternalServerError);
}
return(returnValue);
}
public async Task <IActionResult> Run(
[HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = "/TaxiPrediction")] HttpRequest req)
{
IActionResult result = null;
try
{
string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
var input = JsonConvert.DeserializeObject <TaxiTrip>(requestBody);
TaxiTripFarePrediction prediction = _predictionEnginePool.Predict(
modelName: "TaxiTripModel",
example: input);
var insertedPrediction = new TaxiTripDTO()
{
Id = Guid.NewGuid().ToString(),
VendorId = input.VendorId,
RateCode = input.RateCode,
PassengerCount = input.PassengerCount,
TripTime = input.TripTime,
TripDistance = input.TripDistance,
PaymentType = input.PaymentType,
FareAmount = input.FareAmount,
PredictedFareAmount = prediction.FareAmount
};
ItemResponse <TaxiTripDTO> response = await _taxiContainer.CreateItemAsync(
insertedPrediction,
new PartitionKey(insertedPrediction.VendorId));
_logger.LogInformation($"Inserting prediction cost: {response.RequestCharge} RU/s");
result = new StatusCodeResult(StatusCodes.Status201Created);
}
catch (Exception ex)
{
_logger.LogError($"Something went wrong. Exception thrown: {ex.Message}");
result = new StatusCodeResult(StatusCodes.Status500InternalServerError);
}
return(result);
}
public async Task RegressionTutorial()
{
var regression = new RegressionTaxi();
var model = await regression.Train();
regression.Evaluate(model);
var trip1 = new TaxiTrip
{
VendorId = "VTS",
RateCode = "1",
PassengerCount = 1,
TripDistance = 10.33f,
PaymentType = "CSH",
FareAmount = 0 // predict it. actual = 29.5
};
TaxiTripFarePrediction prediction = model.Predict(trip1);
Console.WriteLine("Predicted fare: {0}, actual fare: 29.5", prediction.FareAmount);
}
public ActionResult Post([FromBody] TaxiTrip input)
{
TaxiTripFarePrediction prediction = _predictionEnginePool.Predict(modelName: "TaxiTripFarePredictionModel", example: input);
return(Ok(prediction.FareAmount));
}
private static void DisplayPredictedFare(TaxiTripFarePrediction prediction)
{
Console.WriteLine();
Console.WriteLine(new String('*', 35));
Console.WriteLine($"Predicted fare: {prediction.FareAmount:0.####}, actual fare: 15.5");
}
