The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()
时间: 2023-10-19 21:06:35 浏览: 36
to get a single boolean value.
This error message occurs when trying to evaluate the truth value of a NumPy array that contains more than one element. The truth value of an array is ambiguous because it depends on the values contained in the array.
To resolve this error, you can use either the any() or all() method to get a single boolean value that represents the truth value of the array.
The any() method returns True if at least one element in the array is True, and False otherwise. For example:
```
import numpy as np
a = np.array([0, 1, 2])
print(a.any()) # True
```
In this example, the any() method returns True because the array contains at least one non-zero element.
The all() method returns True if all elements in the array are True, and False otherwise. For example:
```
import numpy as np
a = np.array([1, 2, 3])
print(a.all()) # True
```
In this example, the all() method returns True because all elements in the array are non-zero.