2017-04-01 104 views
0

我正在使用依賴於具有numpy數組的特定形狀的庫(keras)。我從來沒有遇到以下問題:numpy沒有提出正確的形狀?不包括子陣列的Numpy形狀

這裏是我的輸出,當我輸出我ndarray

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     -1.27849996e-01]], dtype=float32)], dtype=object) 

基本上,它是一個數組的數組列表(的熊貓系列傳遞到矩陣的行)。形狀輸出爲:

(404290,) 

爲什麼不是numpy檢測到我想要一個三維數組?

編輯:改變了一些,因爲我是一個白癡,但在這裏有同樣的問題。

EDIT2:這裏就是我如何創建陣列

train['question1_vector'] = train['question1_nlp'].apply(lambda x: np.array([k.vector[:100] for k in x])) 

基本上,我是從一個句子拉出所有詞矢量(最多100個窗口)的每一行。

然後我打電話

train['question1_vector'].values 

,試圖得到的值。

形狀應該像

(404290, len_of_sentence, 100) 
+0

你是如何創造這個數組? – ZdaR

+0

@ZdaR檢查我的edit2 –

+2

你這個醜陋的轉儲是對象dtype數組,包含不同大小的數組。實際上它是一個數組列表。 – hpaulj

回答

0

比方說,你有這樣的數據:

a = pd.Series(np.arange(1,3)) 
b = a.apply(lambda n: n * np.arange(3*4).reshape(4,-1)) 

b.values現在是:

[ array([[ 0, 1, 2], 
     [ 3, 4, 5], 
     [ 6, 7, 8], 
     [ 9, 10, 11]]) 
array([[ 0, 2, 4], 
     [ 6, 8, 10], 
     [12, 14, 16], 
     [18, 20, 22]])] 

你想 「堆」 這兩個,2D陣列來製作單個3D陣列。例如,11應在22之上,毗鄰的,10應該是對的20

使用np.stack(b, 0)頂部:

[ array([[ 0, 1, 2], 
     [ 3, 4, 5], 
     [ 6, 7, 8], 
     [ 9, 10, 11]]) 
array([[ 0, 2, 4], 
     [ 6, 8, 10], 
     [12, 14, 16], 
     [18, 20, 22]])]