讲ID3算法应用于天气决策。给定一组数据集，构建ID3判定树，对某一天气状况进行判断。使用Python脚本编写，C语言版本可参考百度文库（http://wenku.baidu.com/link?url=B3ltO-rUB7K927wLNaGaSInD0hoXRzjVtxFhwcvCdKqewIOu4BZ3SzpC9kRER4qOdBW2_19j-TdYd0H13LJhXZWApI1udXK3wIKBYwso37e），未验证。-Speak ID3 algorithm is applied to weather decisions. Given a data set, build ID3 decision tree, of a judge weather conditions. Use Python scr ipting, C language version Reference Baidu library (http://wenku.baidu.com/link?url=B3ltO-rUB7K927wLNaGaSInD0hoXRzjVtxFhwcvCdKqewIOu4BZ3SzpC9kRER4qOdBW2_19j-TdYd0H13LJhXZWApI1udXK3wIKBYwso37e), not verified.