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原创机器学习-周志华-课后习题-第2章模型评估与选择

2.1 数据集包含1000个样本，其中500个正例、500个反例，将其划分为包含70%样本的训练集和30%样本的测试集用于留出法评估，试估算共有多少种划分方法。解：考虑到数据分布的一致性，训练集应包含350个正例和350个反例；因此，划分方法有 C_500^350∙C_500^350 种。2.2 数据集包含100个样本，其中正、反例各一半，假定学习算法所产生的

2016-07-15 14:57:35 2677

原创 155. Minimum Depth of Binary Tree

155. Minimum Depth of Binary Tree

2016-05-15 23:16:33 227

原创 97. Maximum Depth of Binary Tree

97. Maximum Depth of Binary Tree

2016-05-15 21:53:19 167

原创 Binary Tree Postorder Traversal

Binary Tree Postorder Traversal

2016-05-15 20:57:10 158

原创 Binary Tree Preorder Traversal

Binary Tree Preorder Traversal

2016-05-15 20:33:32 150

原创 Binary Tree Inorder Traversal

Binary Tree Inorder Traversal

2016-05-15 20:32:03 182

原创 145. Binary Tree Postorder Traversal

145. Binary Tree Postorder Traversal

2016-05-14 22:10:48 172

原创 144. Binary Tree Preorder Traversal

144. Binary Tree Preorder Traversal

2016-05-14 22:00:47 156

原创 159. 寻找旋转排序数组中的最小值

159. 寻找旋转排序数组中的最小值

2016-05-12 21:10:55 218

原创 35. Search Insert Position

35. Search Insert Position

2016-05-11 23:44:06 181

原创 47. Permutations II

47. Permutations II

2016-05-09 19:55:41 206

原创 28. Implement strStr()

28. Implement strStr()

2016-05-08 18:56:48 160

原创 9. Palindrome Number

9. Palindrome Number

2016-04-25 00:31:17 163

原创 326. Power of Three

326. Power of Three

2016-04-22 12:50:55 157

原创 342. Power of Four

342. Power of Four

2016-04-22 11:32:25 152

原创 7. Reverse Integer

7. Reverse Integer

2016-04-16 14:20:05 117

原创 3. Longest Substring Without Repeating Characters

3. Longest Substring Without Repeating Characters

2016-04-16 14:00:07 138

原创 2. Add Two Numbers

2. Add Two Numbers

2016-04-14 18:38:20 140

原创 338. Counting Bits

338. Counting Bits

2016-04-11 22:54:30 157

原创 121. Best Time to Buy and Sell Stock

121. Best Time to Buy and Sell Stock

2016-04-11 22:07:41 139

原创 110. Balanced Binary Tree

110. Balanced Binary Tree

2016-04-07 23:38:42 139

原创 232. Implement Queue using Stacks

232. Implement Queue using Stacks

2016-04-06 23:41:39 147

原创 198. House Robber

198. House Robber

2016-04-06 22:50:33 147

Given a linked list, swap every two adjacent nodes and return its head.For example, Given 1->2->3->4, you should return the list as 2->1->4->3.Your algorithm should use only constant space. You may no

2016-04-04 22:11:33 131

原创 235. Lowest Common Ancestor of a Binary Search Tree

235. Lowest Common Ancestor of a Binary Search Tree

2016-04-04 20:53:25 118

原创 100. Same Tree

100. Same Tree

2016-03-27 23:34:40 131

空空如也

空空如也