// We use the term frequency of the query and the IDF value we previously calculated.
private void CalculateQueryTfIdf(string userQuery)
{
QueryTfIdfWeight = new Dictionary <string, double>();
var queryTermFrequency = CalculateQueryTermFrequency(userQuery);
foreach (KeyValuePair <string, int> entry in queryTermFrequency)
{
if (InverseDocumentFrequency.ContainsKey(entry.Key))
{
var tfidf = entry.Value * InverseDocumentFrequency[entry.Key];
QueryTfIdfWeight.Add(entry.Key, tfidf);
}
else
{
QueryTfIdfWeight.Add(entry.Key, 0);
}
}
}
