js正则验证手机号码有效性详解
通过js正则验证手机号码的有效性，方法如下： 验证130-139,150-159,180-189号码段的手机号码 <script type="text/javascript"> var myreg = /^(((...
qq123
自己实现KNN算法详解
import numpy as np from math import sqrt from collections import Counter class KNNClassifier(object): """do...
数据分类器详解
自己实现 import numpy as np def train_test_split(X, y, test_ratio=0.2, seed=None): """将数据 X 和 y 按照test_ratio分割...
模型准确度测算详解
自己实现 def accuracy_score(y_true, y_predict): """计算y_true和y_predict之间的准确率""" assert len(y_true) == len(y_pre...
寻找超参数详解
best_score = 0.0 best_k = -1 for k in range(1,11): knn_clf = KNeighborsClassifier(n_neighbors=k) knn_clf....
数据归一化详解
import numpy as np from sklearn import datasets from sklearn.model_selection import train_test_split from sklearn....
简单线性回归预测实现详解
import numpy as np from .metrics import r2_score class SimpleLinearRegression: def __init__(self):...
变量 转换详解
package main import ( "fmt" "strconv" ) func main() { var a int = 65 b := strconv.Itoa(a)...
枚举和位移详解
package main import ( "fmt" ) const ( B float64 = 1 << (iota * 10) KB MB GB )...
