could not broadcast input array from shape (2,4) into shape (2,2)
时间: 2024-05-20 19:16:02 浏览: 19
This error message occurs when you are trying to broadcast an input array into a shape that is incompatible with the original shape of the array.
In this specific case, you are trying to broadcast a 2x4 array into a 2x2 array, which is not possible because the shapes do not match.
To resolve this error, you can either reshape the input array to match the desired shape or adjust the shape of the destination array to match the input array.
相关问题
could not broadcast input array from shape (2) into shape (1,35)
This error message indicates that there is a mismatch between the dimensions of two arrays that you are trying to merge or broadcast together. Specifically, you are trying to broadcast an array with shape (2) onto an array with shape (1, 35), which is not possible.
To resolve this error, you will need to reshape or resize one or both of the arrays so that they have compatible shapes. One approach might be to reshape the (2) array to have shape (1, 2) using the np.reshape() function, and then broadcast it onto the (1, 35) array.
For example:
```
import numpy as np
a = np.array([1, 2])
b = np.zeros((1, 35))
a_reshaped = np.reshape(a, (1, 2))
b[:a_reshaped.shape[0], :a_reshaped.shape[1]] += a_reshaped
print(b)
```
This code reshapes the (2) array to have shape (1, 2), and then adds it to the (1, 35) array using array indexing. The resulting output should be a (1, 35) array with the first two elements set to the values of the (2) array.
could not broadcast input array from shape (2,) into shape (10,)
这个错误通常表示你正在尝试将一个形状为 (2,) 的数组广播到一个形状为 (10,) 的数组,但两个形状不兼容。
广播是一种 numpy 中的操作,它可以将不同形状的数组转换为相同形状,以便进行运算。但是,要进行广播,数组的形状必须满足一定的条件。具体而言,每个维度的长度要么相等,要么其中一个长度为 1。如果两个数组的形状无法满足这些条件,则会出现上述错误。
要解决这个问题,你需要检查你的代码,找出哪些地方存在形状不兼容的数组,并修改代码以使它们具有相同的形状或符合广播规则的形状。你可以使用 numpy 的 reshape() 函数来改变数组的形状,或者使用 numpy 的 broadcasting 功能来自动调整数组的形状。
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