在字典中连接多个 Numpy 数组

Question

我有四本词典。字典中每个键的每个值都是一维 numpy 数组。我想将所有这些 numpy 数组合并为一个。例如：

first dictionary =  {'feature1': array([0., 0., 1., 0.]),
'feature2': array([0., 1., 0., 0.]),
'feature3': array([1., 0., 0.,0.,0.,0.])}

 second dictionary = {'feature4': array([0.]),
'feature5': array([0., 0.]),
'feature6': array([0.023]),
'feature7': array([0.009]),
'feature8': array([0.])}

 third dictionary = {'feature9': array([  0.,   0.,   0., 912.,   0.,   0.,   0.]),
'feature10': array([0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0.]),}

生成的最终 numpy 应如下所示：

array([0., 0., 1., 0.,0., 1., 0., 0.,1., 0., 0.,0.,0.,0.,
      0.,0., 0.,0.023,0.009,0.,0.,
       0.,   0., 912.,   0.,   0.,   0.,0., 0., 0.,  0., 
       0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0.]

举个例子，我把这本词典变小了，但我在每本词典中都有 50 个键。所以基本上我想加入我字典中的所有 numpy 数组。我怎样才能做到这一点？将不胜感激。

Answer 1

你可以这样做：

output = []

for dictionary in [firstdictionary,seconddictionary,thirddictionary]:
    for key, value in dictionary.items():
        output += list(value)
    
output_array = np.array(output)

在字典中连接多个 Numpy 数组

concatenating multiple Numpy arrays in dictionaries

dictionary

numpy

python-3.x

numpy-ndarray