public void testSetValue()
{
IPreferenceArray prefs = new GenericUserPreferenceArray(3);
Assert.AreEqual(3, prefs.Length());
prefs.SetValue(0, 1.0f);
prefs.SetValue(1, 2.0f);
prefs.SetValue(2, 3.0f);
Assert.AreEqual(1.0f, prefs.GetValue(0), EPSILON);
Assert.AreEqual(2.0f, prefs.GetValue(1), EPSILON);
Assert.AreEqual(3.0f, prefs.GetValue(2), EPSILON);
}
public void testSetValue()
{
IPreferenceArray prefs = new GenericUserPreferenceArray(3);
Assert.AreEqual(3, prefs.Length());
prefs.SetValue(0, 1.0f);
prefs.SetValue(1, 2.0f);
prefs.SetValue(2, 3.0f);
Assert.AreEqual(1.0f, prefs.GetValue(0), EPSILON);
Assert.AreEqual(2.0f, prefs.GetValue(1), EPSILON);
Assert.AreEqual(3.0f, prefs.GetValue(2), EPSILON);
}
public ActionResult Recommend(string filmIdsJson)
{
var filmIds = (new JavaScriptSerializer()).Deserialize<long[]>(filmIdsJson);
var pathToDataFile =
Path.Combine(System.Web.HttpRuntime.AppDomainAppPath, "data/albums.dat");
if (dataModel == null) {
try
{
dataModel = new FileDataModel(pathToDataFile, false, FileDataModel.DEFAULT_MIN_RELOAD_INTERVAL_MS, false);
}
catch (Exception e)
{
var exe = e.ToString();
}
}
var plusAnonymModel = new PlusAnonymousUserDataModel(dataModel);
var prefArr = new GenericUserPreferenceArray(filmIds.Length);
prefArr.SetUserID(0, PlusAnonymousUserDataModel.TEMP_USER_ID);
for (int i = 0; i < filmIds.Length; i++) {
prefArr.SetItemID(i, filmIds[i]);
prefArr.SetValue(i, 5); // lets assume max rating
}
plusAnonymModel.SetTempPrefs(prefArr);
var similarity = new LogLikelihoodSimilarity(plusAnonymModel);
var neighborhood = new NearestNUserNeighborhood(15, similarity, plusAnonymModel);
var recommender = new GenericBooleanPrefUserBasedRecommender(plusAnonymModel, neighborhood, similarity);
var recommendedItems = recommender.Recommend(PlusAnonymousUserDataModel.TEMP_USER_ID, 5, null);
return Json( recommendedItems.Select(ri => new Dictionary<string, object>() {
{"id", ri.GetItemID() },
{"rating", ri.GetValue() },
}).ToArray() );
}
public void testGetPreferenceValue()
{
PlusAnonymousConcurrentUserDataModel instance = getTestableWithoutDelegateData(10);
long anonymousUserID = instance.TakeAvailableUser().Value;
IPreferenceArray tempPrefs = new GenericUserPreferenceArray(1);
tempPrefs.SetUserID(0, anonymousUserID);
long sampleItemID = 1;
tempPrefs.SetItemID(0, sampleItemID);
tempPrefs.SetValue(0, float.MaxValue);
instance.SetTempPrefs(tempPrefs, anonymousUserID);
Assert.AreEqual(float.MaxValue, instance.GetPreferenceValue(anonymousUserID, sampleItemID), EPSILON);
}
public void testGetPreferenceValue()
{
PlusAnonymousConcurrentUserDataModel instance = getTestableWithoutDelegateData(10);
long anonymousUserID = instance.TakeAvailableUser().Value;
IPreferenceArray tempPrefs = new GenericUserPreferenceArray(1);
tempPrefs.SetUserID(0, anonymousUserID);
long sampleItemID = 1;
tempPrefs.SetItemID(0, sampleItemID);
tempPrefs.SetValue(0, float.MaxValue);
instance.SetTempPrefs(tempPrefs, anonymousUserID);
Assert.AreEqual(float.MaxValue, instance.GetPreferenceValue(anonymousUserID, sampleItemID), EPSILON);
}
