How to extract rows containing a specific number in num…

To extract rows containing a specific number, you can use conditional indexing in numpy. The specific steps are as follows:

1. import the numpy library as np
2. I’m sorry, the provided word “arr” does not have a clear meaning. Can you please provide more context or clarify the word you would like paraphrased?
3. result will be equal to the array elements where the values match 5 in the specified column.
4. index of the column
5. outcome

Here is a complete example code:

import numpy as np

# 创建一个示例数组
arr = np.array([[1, 2, 3],
                [4, 5, 6],
                [7, 8, 9]])

# 提取含有数字5的行
column_index = 1
result = arr[arr[:, column_index] == 5]

print(result)

The output result is:

[[4 5 6]]