/// <summary>
/// Runs the module.
/// </summary>
/// <param name="args">The command line arguments for the module.</param>
/// <param name="usagePrefix">The prefix to print before the usage string.</param>
/// <returns>True if the run was successful, false otherwise.</returns>
public override bool Run(string[] args, string usagePrefix)
{
string datasetFile = string.Empty;
string trainedModelFile = string.Empty;
string predictionsFile = string.Empty;
int maxRelatedItemCount = 5;
int minCommonRatingCount = 5;
int minRelatedItemPoolSize = 5;
var parser = new CommandLineParser();
parser.RegisterParameterHandler("--data", "FILE", "Dataset to make predictions for", v => datasetFile = v, CommandLineParameterType.Required);
parser.RegisterParameterHandler("--model", "FILE", "File with trained model", v => trainedModelFile = v, CommandLineParameterType.Required);
parser.RegisterParameterHandler("--predictions", "FILE", "File with generated predictions", v => predictionsFile = v, CommandLineParameterType.Required);
parser.RegisterParameterHandler("--max-items", "NUM", "Maximum number of related items for a single item; defaults to 5", v => maxRelatedItemCount = v, CommandLineParameterType.Optional);
parser.RegisterParameterHandler("--min-common-users", "NUM", "Minimum number of users that the query item and the related item should have been rated by in common; defaults to 5", v => minCommonRatingCount = v, CommandLineParameterType.Optional);
parser.RegisterParameterHandler("--min-pool-size", "NUM", "Minimum size of the related item pool for a single item; defaults to 5", v => minRelatedItemPoolSize = v, CommandLineParameterType.Optional);
if (!parser.TryParse(args, usagePrefix))
{
return(false);
}
RecommenderDataset testDataset = RecommenderDataset.Load(datasetFile);
var trainedModel = MatchboxRecommender.Load <RecommenderDataset, User, Item, RatingDistribution, DummyFeatureSource>(trainedModelFile);
var evaluator = new RecommenderEvaluator <RecommenderDataset, User, Item, int, int, RatingDistribution>(
Mappings.StarRatingRecommender.ForEvaluation());
IDictionary <Item, IEnumerable <Item> > relatedItems = evaluator.FindRelatedItemsRatedBySameUsers(
trainedModel, testDataset, maxRelatedItemCount, minCommonRatingCount, minRelatedItemPoolSize);
RecommenderPersistenceUtils.SaveRelatedItems(predictionsFile, relatedItems);
return(true);
}
/// <summary>
/// Runs the module.
/// </summary>
/// <param name="args">The command line arguments for the module.</param>
/// <param name="usagePrefix">The prefix to print before the usage string.</param>
/// <returns>True if the run was successful, false otherwise.</returns>
public override bool Run(string[] args, string usagePrefix)
{
string inputDatasetFile = string.Empty;
string outputDatasetFile = string.Empty;
var parser = new CommandLineParser();
parser.RegisterParameterHandler("--input-data", "FILE", "Input dataset, treated as if all the ratings are positive", v => inputDatasetFile = v, CommandLineParameterType.Required);
parser.RegisterParameterHandler("--output-data", "FILE", "Output dataset with both posisitve and negative data", v => outputDatasetFile = v, CommandLineParameterType.Required);
if (!parser.TryParse(args, usagePrefix))
{
return(false);
}
var generatorMapping = Mappings.StarRatingRecommender.WithGeneratedNegativeData();
var inputDataset = RecommenderDataset.Load(inputDatasetFile);
var outputDataset = new RecommenderDataset(
generatorMapping.GetInstances(inputDataset).Select(i => new RatedUserItem(i.User, i.Item, i.Rating)),
generatorMapping.GetRatingInfo(inputDataset));
outputDataset.Save(outputDatasetFile);
return(true);
}
/// <summary>
/// Runs the module.
/// </summary>
/// <param name="args">The command line arguments for the module.</param>
/// <param name="usagePrefix">The prefix to print before the usage string.</param>
/// <returns>True if the run was successful, false otherwise.</returns>
public override bool Run(string[] args, string usagePrefix)
{
string datasetFile = string.Empty;
string trainedModelFile = string.Empty;
string predictionsFile = string.Empty;
var parser = new CommandLineParser();
parser.RegisterParameterHandler("--data", "FILE", "Dataset to make predictions for", v => datasetFile = v, CommandLineParameterType.Required);
parser.RegisterParameterHandler("--model", "FILE", "File with trained model", v => trainedModelFile = v, CommandLineParameterType.Required);
parser.RegisterParameterHandler("--predictions", "FILE", "File with generated predictions", v => predictionsFile = v, CommandLineParameterType.Required);
if (!parser.TryParse(args, usagePrefix))
{
return(false);
}
RecommenderDataset testDataset = RecommenderDataset.Load(datasetFile);
var trainedModel = MatchboxRecommender.Load <RecommenderDataset, User, Item, RatingDistribution, DummyFeatureSource>(trainedModelFile);
IDictionary <User, IDictionary <Item, int> > predictions = trainedModel.Predict(testDataset);
RecommenderPersistenceUtils.SavePredictedRatings(predictionsFile, predictions);
return(true);
}
/// <summary>
/// Runs the module.
/// </summary>
/// <param name="args">The command line arguments for the module.</param>
/// <param name="usagePrefix">The prefix to print before the usage string.</param>
/// <returns>True if the run was successful, false otherwise.</returns>
public override bool Run(string[] args, string usagePrefix)
{
string testDatasetFile = string.Empty;
string predictionsFile = string.Empty;
string reportFile = string.Empty;
var parser = new CommandLineParser();
parser.RegisterParameterHandler("--test-data", "FILE", "Test dataset used to obtain ground truth", v => testDatasetFile = v, CommandLineParameterType.Required);
parser.RegisterParameterHandler("--predictions", "FILE", "Predictions to evaluate", v => predictionsFile = v, CommandLineParameterType.Required);
parser.RegisterParameterHandler("--report", "FILE", "Evaluation report file", v => reportFile = v, CommandLineParameterType.Required);
if (!parser.TryParse(args, usagePrefix))
{
return(false);
}
RecommenderDataset testDataset = RecommenderDataset.Load(testDatasetFile);
IDictionary <User, IDictionary <Item, int> > ratingPredictions = RecommenderPersistenceUtils.LoadPredictedRatings(predictionsFile);
var evaluatorMapping = Mappings.StarRatingRecommender.ForEvaluation();
var evaluator = new StarRatingRecommenderEvaluator <RecommenderDataset, User, Item, int>(evaluatorMapping);
using (var writer = new StreamWriter(reportFile))
{
writer.WriteLine(
"Mean absolute error: {0:0.000}",
evaluator.RatingPredictionMetric(testDataset, ratingPredictions, Metrics.AbsoluteError));
writer.WriteLine(
"Root mean squared error: {0:0.000}",
Math.Sqrt(evaluator.RatingPredictionMetric(testDataset, ratingPredictions, Metrics.SquaredError)));
}
return(true);
}
/// <summary>
/// Runs the module.
/// </summary>
/// <param name="args">The command line arguments for the module.</param>
/// <param name="usagePrefix">The prefix to print before the usage string.</param>
/// <returns>True if the run was successful, false otherwise.</returns>
public override bool Run(string[] args, string usagePrefix)
{
string inputDatasetFile = string.Empty;
string outputTrainingDatasetFile = string.Empty;
string outputTestDatasetFile = string.Empty;
double trainingOnlyUserFraction = 0.5;
double testUserRatingTrainingFraction = 0.25;
double coldUserFraction = 0;
double coldItemFraction = 0;
double ignoredUserFraction = 0;
double ignoredItemFraction = 0;
bool removeOccasionalColdItems = false;
var parser = new CommandLineParser();
parser.RegisterParameterHandler("--input-data", "FILE", "Dataset to split", v => inputDatasetFile = v, CommandLineParameterType.Required);
parser.RegisterParameterHandler("--output-data-train", "FILE", "Training part of the split dataset", v => outputTrainingDatasetFile = v, CommandLineParameterType.Required);
parser.RegisterParameterHandler("--output-data-test", "FILE", "Test part of the split dataset", v => outputTestDatasetFile = v, CommandLineParameterType.Required);
parser.RegisterParameterHandler("--training-users", "NUM", "Fraction of training-only users; defaults to 0.5", (double v) => trainingOnlyUserFraction = v, CommandLineParameterType.Optional);
parser.RegisterParameterHandler("--test-user-training-ratings", "NUM", "Fraction of test user ratings for training; defaults to 0.25", (double v) => testUserRatingTrainingFraction = v, CommandLineParameterType.Optional);
parser.RegisterParameterHandler("--cold-users", "NUM", "Fraction of cold (test-only) users; defaults to 0", (double v) => coldUserFraction = v, CommandLineParameterType.Optional);
parser.RegisterParameterHandler("--cold-items", "NUM", "Fraction of cold (test-only) items; defaults to 0", (double v) => coldItemFraction = v, CommandLineParameterType.Optional);
parser.RegisterParameterHandler("--ignored-users", "NUM", "Fraction of ignored users; defaults to 0", (double v) => ignoredUserFraction = v, CommandLineParameterType.Optional);
parser.RegisterParameterHandler("--ignored-items", "NUM", "Fraction of ignored items; defaults to 0", (double v) => ignoredItemFraction = v, CommandLineParameterType.Optional);
parser.RegisterParameterHandler("--remove-occasional-cold-items", "Remove occasionally produced cold items", () => removeOccasionalColdItems = true);
if (!parser.TryParse(args, usagePrefix))
{
return(false);
}
var splittingMapping = Mappings.StarRatingRecommender.SplitToTrainTest(
trainingOnlyUserFraction,
testUserRatingTrainingFraction,
coldUserFraction,
coldItemFraction,
ignoredUserFraction,
ignoredItemFraction,
removeOccasionalColdItems);
var inputDataset = RecommenderDataset.Load(inputDatasetFile);
var outputTrainingDataset = new RecommenderDataset(
splittingMapping.GetInstances(SplitInstanceSource.Training(inputDataset)),
inputDataset.StarRatingInfo);
outputTrainingDataset.Save(outputTrainingDatasetFile);
var outputTestDataset = new RecommenderDataset(
splittingMapping.GetInstances(SplitInstanceSource.Test(inputDataset)),
inputDataset.StarRatingInfo);
outputTestDataset.Save(outputTestDatasetFile);
return(true);
}
/// <summary>
/// Generate dataset if it necessary and loads the dataset using the settings from this configuration element.
/// </summary>
/// <returns>The loaded dataset.</returns>
public override RecommenderDataset Load()
{
if (!File.Exists(FileName))
{
Type t = Type.GetType(Generator);
if (t == null)
{
throw new InvalidOperationException($"{Generator} type is undefined");
}
IDatasetGenerator generator = (IDatasetGenerator)Activator.CreateInstance(t);
generator.Generate(FileName);
}
return(RecommenderDataset.Load(this.FileName));
}
/// <summary>
/// Runs the module.
/// </summary>
/// <param name="args">The command line arguments for the module.</param>
/// <param name="usagePrefix">The prefix to print before the usage string.</param>
/// <returns>True if the run was successful, false otherwise.</returns>
public override bool Run(string[] args, string usagePrefix)
{
string testDatasetFile = string.Empty;
string predictionsFile = string.Empty;
string reportFile = string.Empty;
var parser = new CommandLineParser();
parser.RegisterParameterHandler("--test-data", "FILE", "Test dataset used to obtain ground truth", v => testDatasetFile = v, CommandLineParameterType.Required);
parser.RegisterParameterHandler("--predictions", "FILE", "Predictions to evaluate", v => predictionsFile = v, CommandLineParameterType.Required);
parser.RegisterParameterHandler("--report", "FILE", "Evaluation report file", v => reportFile = v, CommandLineParameterType.Required);
if (!parser.TryParse(args, usagePrefix))
{
return(false);
}
RecommenderDataset testDataset = RecommenderDataset.Load(testDatasetFile);
int minRating = Mappings.StarRatingRecommender.GetRatingInfo(testDataset).MinStarRating;
IDictionary <User, IEnumerable <Item> > recommendedItems = RecommenderPersistenceUtils.LoadRecommendedItems(predictionsFile);
var evaluatorMapping = Mappings.StarRatingRecommender.ForEvaluation();
var evaluator = new StarRatingRecommenderEvaluator <RecommenderDataset, User, Item, int>(evaluatorMapping);
using (var writer = new StreamWriter(reportFile))
{
writer.WriteLine(
"NDCG: {0:0.000}",
evaluator.ItemRecommendationMetric(
testDataset,
recommendedItems,
Metrics.Ndcg,
rating => Convert.ToDouble(rating) - minRating + 1));
}
return(true);
}
/// <summary>
/// Runs the module.
/// </summary>
/// <param name="args">The command line arguments for the module.</param>
/// <param name="usagePrefix">The prefix to print before the usage string.</param>
/// <returns>True if the run was successful, false otherwise.</returns>
public override bool Run(string[] args, string usagePrefix)
{
string testDatasetFile = string.Empty;
string predictionsFile = string.Empty;
string reportFile = string.Empty;
int minCommonRatingCount = 5;
var parser = new CommandLineParser();
parser.RegisterParameterHandler("--test-data", "FILE", "Test dataset used to obtain ground truth", v => testDatasetFile = v, CommandLineParameterType.Required);
parser.RegisterParameterHandler("--predictions", "FILE", "Predictions to evaluate", v => predictionsFile = v, CommandLineParameterType.Required);
parser.RegisterParameterHandler("--report", "FILE", "Evaluation report file", v => reportFile = v, CommandLineParameterType.Required);
parser.RegisterParameterHandler("--min-common-items", "NUM", "Minimum number of users that the query item and the related item should have been rated by in common; defaults to 5", v => minCommonRatingCount = v, CommandLineParameterType.Optional);
if (!parser.TryParse(args, usagePrefix))
{
return(false);
}
RecommenderDataset testDataset = RecommenderDataset.Load(testDatasetFile);
IDictionary <Item, IEnumerable <Item> > relatedItems = RecommenderPersistenceUtils.LoadRelatedItems(predictionsFile);
var evaluatorMapping = Mappings.StarRatingRecommender.ForEvaluation();
var evaluator = new StarRatingRecommenderEvaluator <RecommenderDataset, User, Item, int>(evaluatorMapping);
using (var writer = new StreamWriter(reportFile))
{
writer.WriteLine(
"L1 Sim NDCG: {0:0.000}",
evaluator.RelatedItemsMetric(testDataset, relatedItems, minCommonRatingCount, Metrics.Ndcg, Metrics.NormalizedManhattanSimilarity));
writer.WriteLine(
"L2 Sim NDCG: {0:0.000}",
evaluator.RelatedItemsMetric(testDataset, relatedItems, minCommonRatingCount, Metrics.Ndcg, Metrics.NormalizedEuclideanSimilarity));
}
return(true);
}
/// <summary>
/// Loads the dataset using the settings from this configuration element.
/// </summary>
/// <returns>The loaded dataset.</returns>
public virtual RecommenderDataset Load()
{
return(RecommenderDataset.Load(this.FileName));
}