#print(mu)#print(sigma)X_norm=(X-mu)/sigmareturnX_norm,mu,sigma #计算损失 defcomputeCost(X,y,theta):m=y.shape[0]#J=(np.sum((X.dot(theta)-y)**2))/(2*m)C=X.dot(theta)-yJ2=(C.T.dot(C))/(2*m)returnJ2#梯度下降 defgradientDescent(X,y,theta,alpha,num_iters):m=y.sha...
python print(str) pythonprintstr输出多个变量 print函数说明print() 函数的详细语法格式如下:print (value,..., sep='', end='\n', file=sys.stdout, flush=False)从上面的语法格式可以看出,value 参数可以接受任意多个变量或变量,依次用逗号拼起来的,因此 print() 函数完全可以输出多个值。例如如下代码:...
# Print out some data points print('First 10 examples from the dataset: \n') print(' x = ',x[range(10),:],'\ny=',y[range(10),:]) First 10 examples from the dataset: x = [[2104 3] [1600 3] [2400 3] [1416 2] [3000 4] [1985 4] [1534 3] [1427 3] [1380 3] [...
# Print out some data points print('First 10 examples from the dataset: \n') print(' x = ',x[range(10),:],'\ny=',y[range(10),:]) First 10 examples from the dataset: x = [[2104 3] [1600 3] [2400 3] [1416 2] [3000 4] [1985 4] [1534 3] [1427 3] [1380 3] [...
print(y) print(z) Try it Yourself » Note:Make sure the number of variables matches the number of values, or else you will get an error. And you can assign thesamevalue to multiple variables in one line: Example x = y = z ="Orange" ...
print(computeCost(X,initial_theta,y))# 打印测试的平均均方代价结果,正确的平均均方代价:32.07 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 32.07273387745567 1. #定义梯度下降函数:随着梯度下降的每一步,参数theta_j都会接近最优值(最小值),从而达到损失最低的J(θ) ...
Assigning a single value to multiple variables we can assign a single value to multiple variables simultaneously using the assignment operator =. Now, let’s create an example to assign the single value 10 to all three variables a, b, and c. Example a = b = c = 10 print(a) # 10 pr...
When referring to multiple variables parenthesis is used. Example: str1 = 'World' str2 = ':' print("Python %s %s" %(str1,str2)) Output: Python World : Repeating Characters Use multiplication with strings to repeat characters: print('#' * 10) # Output: ### Other Examples...
Example: Assigning multiple values to multiple variables a, b, c =5,3.2,'Hello'print(a)# prints 5print(b)# prints 3.2print(c)# prints Hello Run Code If we want to assign the same value to multiple variables at once, we can do this as: ...
>>> print(y) 1 >>> print(z) 1 >>> Alternatively, you can assign multiple values to multiple variables in a single line. Syntax: , , ..., = <expr>, <expr>, ..., <expr> Example: x, y, z = 1, 2, "abcd" In the above example...