'numpy.ndarray' object has no attribute 'toarray'
时间: 2023-09-25 12:16:25 浏览: 179
This error occurs when you try to call the `.toarray()` method on a NumPy ndarray object. The `.toarray()` method is only available for sparse matrices, not for dense arrays.
To fix this error, you can either convert your dense array to a sparse matrix using the `scipy.sparse` module or use other NumPy methods to perform the desired operation on the dense array.
For example, if you have a sparse matrix `sparse_mat` and you want to convert it to a dense array, you can use the `.toarray()` method:
```
import scipy.sparse as sp
dense_array = sparse_mat.toarray()
```
However, if you have a dense array `dense_array` and you want to perform some operation to get a binary array indicating which elements are greater than a certain threshold, you can use NumPy's `np.where()` method:
```
import numpy as np
threshold = 0.5
binary_array = np.where(dense_array > threshold, 1, 0)
```