class_names = ["Rejects", "Accepts"] cm = confusion_matrix(y_test, y_pred,labels= [0, 1])
时间: 2024-05-22 08:10:41 浏览: 10
这段代码用于计算模型的混淆矩阵(confusion matrix),其中y_test是测试集的真实标签,y_pred是模型对测试集的预测标签。class_names是用于标识混淆矩阵中每个类别的名称,这里是"Rejects"和"Accepts"。
confusion matrix是一个2x2的矩阵,每一行代表真实标签,每一列代表预测标签。以二分类问题为例,矩阵的四个元素分别表示:真正例(true positive,TP)、假正例(false positive,FP)、假反例(false negative,FN)和真反例(true negative,TN)。
在代码中,labels参数用于指定类别的顺序,这里0代表"Rejects",1代表"Accepts"。函数返回一个二维数组,即混淆矩阵。
相关问题
const { rejects } = require('assert')
这不是一个问题,而是一个 JavaScript 中使用 assert 模块的语句。assert 模块提供了一些断言函数,用于测试程序中的数据是否符合预期。常用的函数有 assert.equal()、assert.strictEqual() 等。如果测试不通过,这些函数会通过抛出异常的方式来告诉你测试失败了。
NRF5 BLE_GAP_EVT_PHY_UPDATE_REQUEST
NRF5 BLE_GAP_EVT_PHY_UPDATE_REQUEST is an event that occurs when the BLE stack requests a PHY (physical layer) update from the remote device. PHY is the layer in the Bluetooth Low Energy stack that determines the physical characteristics of the communication link, such as data rate and signal strength. The PHY update request event is triggered when the remote device requests a change in the PHY parameters, such as increasing the data rate or changing the modulation scheme. This event provides an opportunity for the application to accept or reject the PHY update request. If the application accepts the request, the BLE stack will update the PHY parameters and notify the remote device of the change. If the application rejects the request, the BLE stack will continue to use the current PHY parameters.
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