解释np.random.random(20)*10-5
时间: 2023-05-11 18:02:22 浏览: 50
np.random.random(20)生成一个长度为20的随机数组,每个元素都是0到1之间的随机数。乘以10之后,每个元素都变成了0到10之间的随机数。再减去5,每个元素都变成了-5到5之间的随机数。因此,np.random.random(20)*10-5的作用是生成一个长度为20的随机数组,每个元素都是-5到5之间的随机数。
相关问题
flip = np.random.choice(2) * 2 - 1
This line of code generates a random number either 1 or -1. It does this by first using the numpy.random.choice() function to randomly select between two options (0 or 1) and then multiplying the result by 2 and subtracting 1. This results in a random number that is either 1 or -1.
This code could be used in a variety of applications where a random binary choice is needed, such as simulating coin flips or assigning values to binary variables.
df = pd.DataFrame({"value1":np.random.rand(10)*20, 'value2':np.random.rand(10)*100})
This code creates a pandas DataFrame with two columns named "value1" and "value2". The "value1" column contains randomly generated values between 0 and 20, while the "value2" column contains randomly generated values between 0 and 100. There are 10 rows in the DataFrame.
相关推荐
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)