/// <summary>
/// Evaluate model defined in the mlconfig file
/// </summary>
/// <param name="mlconfigPath"></param>
/// <param name="device"></param>
/// <returns></returns>
public static async Task <EvaluationResult> EvaluateMLConfig(string mlconfigPath, DeviceDescriptor device, DataSetType dsType, EvaluationType evType)
{
try
{
//define eval result
var er = new EvaluationResult();
er.OutputClasses = new List <string>()
{
""
};
er.Actual = new List <float>();
er.Predicted = new List <float>();
er.Header = new List <string>();
//Load ML configuration file
var dicMParameters = MLFactory.LoadMLConfiguration(mlconfigPath);
//add full path of model folder since model file doesn't contains any absolute path
dicMParameters.Add("root", MLFactory.GetMLConfigFolder(mlconfigPath));
// get model data paths
var dicPath = MLFactory.GetMLConfigComponentPaths(dicMParameters["paths"]);
//parse feature variables
var projectValues = dicMParameters["training"].Split(MLFactory.m_cntkSpearator, StringSplitOptions.RemoveEmptyEntries);
var modelName = MLFactory.GetParameterValue(projectValues, "TrainedModel");
var nnModelPath = Path.Combine(dicMParameters["root"], modelName);
//check if model exists
if (!MLFactory.IsFileExist(nnModelPath))
{
return(er);
}
//
var dataset = MLFactory.GetDataPath(dicMParameters, dsType);
if (string.IsNullOrEmpty(dataset) || string.IsNullOrEmpty(dataset) || dataset == " ")
{
if (dsType == DataSetType.Testing)
{
dataset = MLFactory.GetDataPath(dicMParameters, DataSetType.Validation);
}
if (string.IsNullOrEmpty(dataset) || string.IsNullOrEmpty(dataset) || dataset == " ")
{
return(er);
}
}
//get output classes in case the ml problem is classification
var strCls = dicMParameters.ContainsKey("metadata") ? dicMParameters["metadata"] : "";
var oc = MLFactory.GetOutputClasses(strCls);
if (oc != null)
{
er.OutputClasses = oc;
}
//MInibatch
var mbTypestr = MLFactory.GetParameterValue(projectValues, "Type");
MinibatchType mbType = (MinibatchType)Enum.Parse(typeof(MinibatchType), mbTypestr, true);
var mbSizetr = MLFactory.GetParameterValue(projectValues, "BatchSize");
var mf = MLFactory.CreateMLFactory(dicMParameters);
//perform evaluation
var evParams = new EvaluationParameters()
{
MinibatchSize = uint.Parse(mbSizetr),
MBSource = new MinibatchSourceEx(mbType, mf.StreamConfigurations.ToArray(), mf.InputVariables, mf.OutputVariables, dataset, null, MinibatchSource.FullDataSweep, false, 0),
Input = mf.InputVariables,
Ouptut = mf.OutputVariables,
};
//evaluate model
if (evType == EvaluationType.FeaturesOnly)
{
if (!dicMParameters.ContainsKey("metadata"))
{
throw new Exception("The result cannot be exported to Excel, since no metadata is stored in mlconfig file.");
}
var desc = MLFactory.ParseRawDataSet(dicMParameters["metadata"]);
er.Header = MLFactory.GenerateHeader(desc);
var fun = Function.Load(nnModelPath, device);
//
er.DataSet = await Task.Run(() => MLEvaluator.FeaturesAndLabels(fun, evParams, device));
return(er);
}
else if (evType == EvaluationType.Results)
{
//define header
er.Header.Add(evParams.Ouptut.First().Name + "_actual");
er.Header.Add(evParams.Ouptut.First().Name + "_predicted");
var fun = Function.Load(nnModelPath, device);
//
var result = await Task.Run(() => MLEvaluator.EvaluateFunction(fun, evParams, device));
er.Actual = result.actual.ToList();
er.Predicted = result.predicted.ToList();
if (er.OutputClasses.Count < 2 && evParams.Ouptut.First().Shape.Dimensions.Last() > 1)
{
var result1 = await Task.Run(() => MLEvaluator.EvaluateFunctionEx(fun, evParams, device));
er.ActualEx = result1.actual;
er.PredictedEx = result1.predicted;
}
return(er);
}
else if (evType == EvaluationType.ResultExtended)
{
//define header
er.Header.Add(evParams.Ouptut.First().Name + "_actual");
er.Header.Add(evParams.Ouptut.First().Name + "_predicted");
er.Actual = new List <float>();
er.Predicted = new List <float>();
er.ActualEx = new List <List <float> >();
er.PredictedEx = new List <List <float> >();
//
var fun = Function.Load(nnModelPath, device);
var resultEx = await Task.Run(() => MLEvaluator.EvaluateFunctionEx(fun, evParams, device));
//var resultEx = EvaluateFunctionEx(nnModelPath, dataPath, evParams, device);
for (int i = 0; i < resultEx.actual.Count(); i++)
{
var res1 = MLValue.GetResult(resultEx.actual[i]);
er.Actual.Add(res1);
var res2 = MLValue.GetResult(resultEx.predicted[i]);
er.Predicted.Add(res2);
}
er.ActualEx = resultEx.actual;
er.PredictedEx = resultEx.predicted;
return(er);
}
else
{
throw new Exception("Unknown evaluation type!");
}
}
catch (Exception)
{
throw;
}
}
