Post-pruning in CART consists of the following procedure:
A: First, consider the cost complexity of a tree.
B: Then, for each internal node, N, compute the cost complexity of the subtree at N.
C: And also compute the cost complexity of the subtree at N if it were to be pruned.
D: At last, compare the two values. If pruning the subtree at node N would result in a smaller cost complexity, the subtree is pruned. Otherwise, the subtree is kept.
A: First, consider the cost complexity of a tree.
B: Then, for each internal node, N, compute the cost complexity of the subtree at N.
C: And also compute the cost complexity of the subtree at N if it were to be pruned.
D: At last, compare the two values. If pruning the subtree at node N would result in a smaller cost complexity, the subtree is pruned. Otherwise, the subtree is kept.
举一反三
- Which one of the following is an example for exponential time complexity? A: O(2<sup>n</sup>) B: O(1) C: O(n) D: O(n<sup>2</sup>)
- Which one of the following is an example for exponential time complexity?( ) A: O(2n) B: O(n2) C: O(n) D: O(1)
- 雨课堂: 语法判断 The complexity of ESD by means of the number of visited nodes is upper bounded by n< A*B.
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- Which of the following are the two dimensions of environmental uncertainty? A: degree of change and degree of complexity B: degree of change and degree of volume C: degree of complexity and degree of impact D: degree of impact and degree of timing