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Update numpy_exercises_for_data_analysis.md #38

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9 changes: 3 additions & 6 deletions docs/article/advanced/numpy_exercises_for_data_analysis.md
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Original file line number Diff line number Diff line change
Expand Up @@ -1672,11 +1672,8 @@ arr

# Solution:
def one_hot_encodings(arr):
uniqs = np.unique(arr)
out = np.zeros((arr.shape[0], uniqs.shape[0]))
for i, k in enumerate(arr):
out[i, k-1] = 1
return out
maxv = np.max(arr)
return np.array([[1 if v==i else 0 for i in range(1,maxv+1)]for v in arr])

one_hot_encodings(arr)
# > array([[ 0., 1., 0.],
Expand Down Expand Up @@ -2385,4 +2382,4 @@ print(gen_strides(np.arange(15), stride_len=2, window_len=4))

## 文章出处

由NumPy中文文档翻译，原作者为 machinelearningplus.com，翻译至：[https://www.machinelearningplus.com/python/101-numpy-exercises-python/](https://www.machinelearningplus.com/python/101-numpy-exercises-python/)
由NumPy中文文档翻译，原作者为 machinelearningplus.com，翻译至：[https://www.machinelearningplus.com/python/101-numpy-exercises-python/](https://www.machinelearningplus.com/python/101-numpy-exercises-python/)