今天使用Python的sklearn模块训练模型时,报错ValueError: The number of classes has to be greater than one; got 1 class,如下: 最后发现是样本原因,y变量只有一个类型,如下: 这也是报错的原因,指的是我们的预测变量y只有一个类型。...【LeetCode 1248】 Count Number of Nice Subarrays 题目描述 Given an...
[leetcode] 1343. Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold Description Given an array of integers arr and two integers k and threshold. Return the number of sub-arrays of size k and average greater than or equal to threshold. Example 1: Input: arr =...