摘要: static bool cmp(pair<char, int> a , pair<char,int> b) { return a.second>b.second; //按照value从大到小重新排序 } string frequencySort(string s) { unordered_map<c 阅读全文
posted @ 2020-04-27 21:45 qiezi_online 阅读(594) 评论(0) 推荐(0)
摘要: from sklearn import datasets from sklearn.tree import DecisionTreeClassifier 1.载入iris数据集(from sklearn import datasets) x = iris.data[:,[0,2]] # x = ir 阅读全文
posted @ 2020-04-27 09:58 qiezi_online 阅读(4154) 评论(0) 推荐(0)