Numpy.ndarray has no attribute replace怎么改
时间: 2023-09-10 07:14:16 浏览: 118
`numpy.ndarray`没有`replace`属性,因为它是一个多维数组对象。如果你想要替换`ndarray`中的元素,可以使用`numpy.where`或者数组索引。
例如,如果你想要把`ndarray`中的所有1替换成2,可以这样做:
```python
import numpy as np
arr = np.array([1, 2, 3, 1, 4, 1])
arr[arr == 1] = 2
print(arr)
# 输出: [2 2 3 2 4 2]
```
如果你想要使用`numpy.where`来替换,可以这样做:
```python
import numpy as np
arr = np.array([1, 2, 3, 1, 4, 1])
new_arr = np.where(arr == 1, 2, arr)
print(new_arr)
# 输出: [2 2 3 2 4 2]
```
这里的`np.where`函数的第一个参数是要进行比较的条件,第二个参数是满足条件时要赋的值,第三个参数是不满足条件时要赋的值。
相关问题
'numpy.ndarray' object has no attribute 'replace'
The message `'numpy.ndarray' object has no attribute 'replace'` occurs when you try to call the `replace()` method on a NumPy array. However, NumPy arrays do not have a `replace()` method, which is why this error occurs.
The `replace()` method is a string method that replaces the occurrences of a substring with another substring. If you want to replace values in a NumPy array, you need to use the `numpy.where()` function instead.
For example, if you have a NumPy array `arr` and you want to replace all occurrences of the value 0 with the value 1, you can use the following code:
```
import numpy as np
arr = np.array([0, 1, 2, 0, 3, 0])
new_arr = np.where(arr == 0, 1, arr)
print(new_arr)
```
This code will output:
```
[1 1 2 1 3 1]
```
In this code, the `np.where()` function takes three arguments: the condition to test (`arr == 0`), the value to replace with if the condition is true (`1`), and the value to keep if the condition is false (`arr`). This replaces all occurrences of 0 with 1 in the `arr` array.
AttributeError: 'numpy.ndarray' object has no attribute 'replace'什么原因
引用和引用[2]都出现了类似的错误提示信息,即'numpy.ndarray' object has no attribute 'insert'。这个错误意味着你正在尝试在一个numpy数组对象上使用insert方法,但是numpy数组并没有insert这个方法。这可能是因为你误以为numpy数组和列表具有相同的方法,导致你错误地使用了insert方法。
对于引用中的错误,错误提示信息是'DataFrame' object has no attribute 'score'。这个错误意味着你在一个DataFrame对象上使用了score属性,但是DataFrame对象并没有score属性。可能是你误以为DataFrame对象有score属性而导致错误。
所以,这些错误的原因都是因为你在对象上使用了它们没有的属性或方法。要解决这个问题,你需要仔细检查你的代码,确保你在正确的对象上使用正确的属性和方法。