static VersatileMLDataSet CreateDataset()
{
var dataset = new VersatileMLDataSet(new CSVDataSource("survey_processed_results.csv", true, CSVFormat.English));
ColumnDefinition outputColumnDefinition = null;
// reading in the pre-processed CSV
using (TextReader textReader = File.OpenText("survey_processed_results.csv"))
{
var headers = textReader.ReadLine();
var splitHeaders = headers.Replace("\"", "").Split(',');
for (var i = 0; i < splitHeaders.Length; i++)
{
var header = splitHeaders[i];
if (header.Contains("Id"))
{
dataset.DefineSourceColumn(header, i, ColumnType.Ignore);
continue;
}
if (header.Contains("Salary"))
{
outputColumnDefinition = dataset.DefineSourceColumn(header, i, ColumnType.Continuous);
continue;
}
if (header.Contains("Years"))
{
var yearsColumn = dataset.DefineSourceColumn(header, i, ColumnType.Ordinal);
yearsColumn.DefineClass(new[] { "ZeroToTwo",
"ThreeToFive",
"SixToEight",
"NineToEleven",
"TwelveToFourteen",
"FifteenToSeventeen",
"EighteenToTwenty",
"TwentyOneToTwentyThree",
"TwentyFourToTwentySix",
"TwentySevenToTwentyNine",
"ThirtyPlus" });
continue;
}
// all other columns are booleans - most of which are a result
// of one-hot encoding.
var booleanColumn = dataset.DefineSourceColumn(header, i, ColumnType.Ordinal);
booleanColumn.DefineClass(new[] { "False", "True" });
}
}
dataset.DefineSingleOutputOthersInput(outputColumnDefinition);
dataset.Analyze();
return(dataset);
}
public void traning(string traningexamplespath)
{
IVersatileDataSource source = new CSVDataSource(traningexamplespath, false, CSVFormat.DecimalPoint);
var data = new VersatileMLDataSet(source);
data.DefineSourceColumn("num1", 0, ColumnType.Continuous);
data.DefineSourceColumn("num2", 1, ColumnType.Continuous);
data.DefineSourceColumn("num1", 2, ColumnType.Continuous);
data.DefineSourceColumn("num1", 3, ColumnType.Continuous);
data.DefineSourceColumn("num1", 4, ColumnType.Continuous);
data.DefineSourceColumn("num1", 5, ColumnType.Continuous);
data.DefineSourceColumn("num1", 6, ColumnType.Continuous);
data.DefineSourceColumn("num1", 7, ColumnType.Continuous);
data.DefineSourceColumn("num1", 8, ColumnType.Continuous);
data.DefineSourceColumn("num1", 9, ColumnType.Continuous);
data.DefineSourceColumn("num1", 10, ColumnType.Continuous);
data.DefineSourceColumn("num1", 11, ColumnType.Continuous);
ColumnDefinition outputColumn = data.DefineSourceColumn("kind", 12, ColumnType.Nominal);
data.Analyze();
data.DefineSingleOutputOthersInput(outputColumn);
var model = new EncogModel(data);
model.SelectMethod(data, MLMethodFactory.TypeFeedforward);
// Send any output to the console.
model.Report = new ConsoleStatusReportable();
// Now normalize the data. Encog will automatically determine the correct normalization
// type based on the model you chose in the last step.
data.Normalize();
model.HoldBackValidation(0.3, true, 1001);
// Choose whatever is the default training type for this model.
model.SelectTrainingType(data);
// Use a 5-fold cross-validated train. Return the best method found.
bestMethod = (IMLRegression)model.Crossvalidate(5, true);
//Console.WriteLine(@"Training error: " + model.CalculateError(bestMethod, model.TrainingDataset));
//Console.WriteLine(@"Validation error: " + model.CalculateError(bestMethod, model.ValidationDataset));
// Display our normalization parameters.
helper = data.NormHelper;
// Console.WriteLine(helper.ToString());
// Display the final model.
//Console.WriteLine(@"Final model: " + bestMethod);
source.Close();
saveNetwork("save.eg");
savehelper("helper.hp");
//EncogFramework.Instance.Shutdown();
}
/// <summary>
/// Program entry point.
/// </summary>
/// <param name="app">Holds arguments and other info.</param>
public void Execute(IExampleInterface app)
{
// Download the data that we will attempt to model.
string irisFile = DownloadData(app.Args);
// Define the format of the data file.
// This area will change, depending on the columns and
// format of the file that you are trying to model.
IVersatileDataSource source = new CSVDataSource(irisFile, false,
CSVFormat.DecimalPoint);
var data = new VersatileMLDataSet(source);
data.DefineSourceColumn("sepal-length", 0, ColumnType.Continuous);
data.DefineSourceColumn("sepal-width", 1, ColumnType.Continuous);
data.DefineSourceColumn("petal-length", 2, ColumnType.Continuous);
data.DefineSourceColumn("petal-width", 3, ColumnType.Continuous);
// Define the column that we are trying to predict.
ColumnDefinition outputColumn = data.DefineSourceColumn("species", 4,
ColumnType.Nominal);
// Analyze the data, determine the min/max/mean/sd of every column.
data.Analyze();
// Map the prediction column to the output of the model, and all
// other columns to the input.
data.DefineSingleOutputOthersInput(outputColumn);
// Create feedforward neural network as the model type. MLMethodFactory.TYPE_FEEDFORWARD.
// You could also other model types, such as:
// MLMethodFactory.SVM: Support Vector Machine (SVM)
// MLMethodFactory.TYPE_RBFNETWORK: RBF Neural Network
// MLMethodFactor.TYPE_NEAT: NEAT Neural Network
// MLMethodFactor.TYPE_PNN: Probabilistic Neural Network
var model = new EncogModel(data);
model.SelectMethod(data, MLMethodFactory.TypeFeedforward);
// Send any output to the console.
model.Report = new ConsoleStatusReportable();
// Now normalize the data. Encog will automatically determine the correct normalization
// type based on the model you chose in the last step.
data.Normalize();
// Hold back some data for a final validation.
// Shuffle the data into a random ordering.
// Use a seed of 1001 so that we always use the same holdback and will get more consistent results.
model.HoldBackValidation(0.3, true, 1001);
// Choose whatever is the default training type for this model.
model.SelectTrainingType(data);
// Use a 5-fold cross-validated train. Return the best method found.
var bestMethod = (IMLRegression)model.Crossvalidate(5, true);
// Display the training and validation errors.
Console.WriteLine(@"Training error: " + model.CalculateError(bestMethod, model.TrainingDataset));
Console.WriteLine(@"Validation error: " + model.CalculateError(bestMethod, model.ValidationDataset));
// Display our normalization parameters.
NormalizationHelper helper = data.NormHelper;
Console.WriteLine(helper.ToString());
// Display the final model.
Console.WriteLine(@"Final model: " + bestMethod);
// Loop over the entire, original, dataset and feed it through the model.
// This also shows how you would process new data, that was not part of your
// training set. You do not need to retrain, simply use the NormalizationHelper
// class. After you train, you can save the NormalizationHelper to later
// normalize and denormalize your data.
source.Close();
var csv = new ReadCSV(irisFile, false, CSVFormat.DecimalPoint);
var line = new String[4];
IMLData input = helper.AllocateInputVector();
while (csv.Next())
{
var result = new StringBuilder();
line[0] = csv.Get(0);
line[1] = csv.Get(1);
line[2] = csv.Get(2);
line[3] = csv.Get(3);
String correct = csv.Get(4);
helper.NormalizeInputVector(line, ((BasicMLData)input).Data, false);
IMLData output = bestMethod.Compute(input);
String irisChosen = helper.DenormalizeOutputVectorToString(output)[0];
result.Append(line);
result.Append(" -> predicted: ");
result.Append(irisChosen);
result.Append("(correct: ");
result.Append(correct);
result.Append(")");
Console.WriteLine(result.ToString());
}
csv.Close();
// Delete data file ande shut down.
File.Delete(irisFile);
EncogFramework.Instance.Shutdown();
}
