from sklearn.model_selection import train_test_split from sklearn.datasets import load_iris # 加载鸢尾花数据集 data = load_iris() X, y = data.data, data.target # 使用train_test_split函数划分数据集 X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.3, random_...
针对您遇到的 NameError: name 'train_test_split' is not defined 错误,这个问题通常是因为没有正确导入包含 train_test_split 函数的库。train_test_split 函数是 scikit-learn 库中用于分割数据集为训练集和测试集的常用函数。以下是一些解决步骤和代码示例,帮助您解决这个问题: 1. 确认train_test_split函数所...
X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42) #split into training and testing set 80/20 ratio NameError: name 'train_test_split' is not defined Unsure of how to proceed, any direction or input would be much appreciated. Thank you, ...
27. ValueError: Sample larger than population or is negative import random a = [1, 2, 3, 4, 5] s = random.sample(a, 6) # 采样数据太多,多于总的数据。 print(a) 在使用随机库的时候,用它的采样函数,上面的例子采样数目多于总体的数目,因此报错。可以调整采样数目改正错误。 import random a =...
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Serves as the base class for application-defined exceptions. ApplicationId Contains information used to uniquely identify a manifest-based application. This class cannot be inherited. ArgumentException The exception that is thrown when one of the arguments provided to a method is not valid. Argument...
而using 编译指令使所有的名称都可以用。 using namespace std; int main() { cout<<"aa";
Serves as the base class for application-defined exceptions. ApplicationId Contains information used to uniquely identify a manifest-based application. This class cannot be inherited. ArgumentException The exception that is thrown when one of the arguments provided to a method is not valid. Argument...
SplittableRandom A generator of uniform pseudorandom values applicable for use in (among other contexts) isolated parallel computations that may generate subtasks. Stack The Stack class represents a last-in-first-out (LIFO) stack of objects. StringJoiner StringJoiner is used to construct a sequ...