mat1 and mat2 shapes cannot be multiple d
时间: 2023-09-23 08:03:32 浏览: 124
The error message "mat1 and mat2 shapes cannot be multiplied" typically occurs in Python when you try to perform a matrix multiplication operation between two matrices that have incompatible shapes.
In particular, the number of columns in the first matrix (mat1) must be equal to the number of rows in the second matrix (mat2) in order for the multiplication to be valid. If this condition is not met, then you will get the "shapes cannot be multiplied" error.
To solve this error, you need to check the shapes of your matrices and make sure they are compatible for matrix multiplication. You can use the numpy library in Python to perform matrix multiplication as follows:
```
import numpy as np
# define two matrices
mat1 = np.array([[1, 2], [3, 4]])
mat2 = np.array([[5, 6], [7, 8]])
# perform matrix multiplication
result = np.dot(mat1, mat2)
# print the result
print(result)
```
This code will perform matrix multiplication between mat1 and mat2, and store the result in the variable "result". You can then print the result to verify that the multiplication was successful.