TF-IDF C#版

namespace Test.TFIDF { class IF_IDF { /// /// 获取拆分后的词组以及每个词的出现次数 /// /// /// public Dictionary GetWordsFrequnce(string text) { Dictionary dictionary = new Dictionary(); Regex regex = new Regex(@"[\u4e00-\u9fa5]");//分拣出中文字符 MatchCollection results = regex.Matches(text); int temp; foreach (Match word in results) { if (dictionary.TryGetValue(word.Value, out temp)) { temp++; dictionary.Remove(word.Value); dictionary.Add(word.Value, temp); } else { dictionary.Add(word.Value, 1); } } return dictionary; } /// /// 文档中出现次数最多的词的出现次数 /// /// 拆分后的词组字典 /// public int MaxWordFrequence( Dictionary wordsfre) { Dictionary.ValueCollection values = wordsfre.Values; int maxfre = 0; foreach (int value in values) { if (maxfre < value) { maxfre = value; } } return maxfre; } /// /// 计算某词的IF，返回结果 /// /// /// ///