private AccuracyNrec CalculateAccuracy(List <RecommendedItems> recommendations, IList <UserItemPurchase> purchases)
{
IList <UserItemlist> recommendations5 = recommendations
.Select(a => new UserItemlist
{
UserId = a.User,
Items = a.Items.OrderByDescending(b => b.Rating).Take(5).Select(c => c.ItemId).ToList()
}).ToList();
IList <UserItemlist> recommendations10 = recommendations
.Select(a => new UserItemlist
{
UserId = a.User,
Items = a.Items.OrderByDescending(b => b.Rating).Take(10).Select(c => c.ItemId).ToList()
}).ToList();
IList <UserItemlist> recommendations20 = recommendations
.Select(a => new UserItemlist
{
UserId = a.User,
Items = a.Items.OrderByDescending(b => b.Rating).Take(20).Select(c => c.ItemId).ToList()
}).ToList();
IList <UserItemlist> recommendations50 = recommendations
.Select(a => new UserItemlist
{
UserId = a.User,
Items = a.Items.OrderByDescending(b => b.Rating).Take(50).Select(c => c.ItemId).ToList()
}).ToList();
AccuracyNrec accuracyNrec = new AccuracyNrec();
RecEvaluation recEvaluation = new RecEvaluation();
accuracyNrec.Precicion5 = recEvaluation.Precision(recommendations5, purchases);
accuracyNrec.Recall5 = recEvaluation.Recall(recommendations5, purchases);
accuracyNrec.F15 = recEvaluation.F1(accuracyNrec.Precicion5, accuracyNrec.Recall5);
accuracyNrec.RecallwithFrequency5 = recEvaluation.RecallWithFrequency(recommendations5, purchases);
accuracyNrec.F1withFrequency5 = recEvaluation.F1(accuracyNrec.Precicion5, accuracyNrec.RecallwithFrequency5);
accuracyNrec.Precicion10 = recEvaluation.Precision(recommendations10, purchases);
accuracyNrec.Recall10 = recEvaluation.Recall(recommendations10, purchases);
accuracyNrec.F110 = recEvaluation.F1(accuracyNrec.Precicion10, accuracyNrec.Recall10);
accuracyNrec.RecallwithFrequency10 = recEvaluation.RecallWithFrequency(recommendations10, purchases);
accuracyNrec.F1withFrequency10 = recEvaluation.F1(accuracyNrec.Precicion10, accuracyNrec.RecallwithFrequency10);
accuracyNrec.Precicion20 = recEvaluation.Precision(recommendations20, purchases);
accuracyNrec.Recall20 = recEvaluation.Recall(recommendations20, purchases);
accuracyNrec.F120 = recEvaluation.F1(accuracyNrec.Precicion20, accuracyNrec.Recall20);
accuracyNrec.RecallwithFrequency20 = recEvaluation.RecallWithFrequency(recommendations20, purchases);
accuracyNrec.F1withFrequency20 = recEvaluation.F1(accuracyNrec.Precicion20, accuracyNrec.RecallwithFrequency20);
accuracyNrec.Precicion50 = recEvaluation.Precision(recommendations50, purchases);
accuracyNrec.Recall50 = recEvaluation.Recall(recommendations50, purchases);
accuracyNrec.F150 = recEvaluation.F1(accuracyNrec.Precicion50, accuracyNrec.Recall50);
accuracyNrec.RecallwithFrequency50 = recEvaluation.RecallWithFrequency(recommendations50, purchases);
accuracyNrec.F1withFrequency50 = recEvaluation.F1(accuracyNrec.Precicion50, accuracyNrec.RecallwithFrequency50);
return(accuracyNrec);
}
public IActionResult EvaluationResults(int recommendationNumber, DateTime trainStartDate, DateTime trainEndDate, DateTime testStartDate, DateTime testEndDate)
{
string recType = "PurchaseFrequency11Month";
int recInfoid = _dbContext.RecommendationInfo.First(a => string.Equals(a.RecName, recType)).RecId;
IQueryable <UkRetailOriginalSales> ukRetailOriginalSales = _dbContext.UkRetailOriginalSales;
IQueryable <Recommendation> recommendations = _dbContext.Recommendation.
Where(a => a.RecommendationInfoId == recInfoid);
RecEvaluation recEvaluation = new RecEvaluation();
AccuracyNrec accuracyNrec = recEvaluation.RecEvaluate(ukRetailOriginalSales, recommendations, recType, trainStartDate, trainEndDate, testStartDate, testEndDate);
return(View(accuracyNrec));
}