出现cannot reshape array of size 27749792 into shape (300,1)

Question

 # 转numpy数组,打乱顺序
    dataSet = np.array(dataSet).reshape(-1, 300)
    lableSet = np.array(lableSet).reshape(-1, 1)
    train_ds = np.hstack((dataSet, lableSet))
    np.random.shuffle(train_ds)

    # 数据集及其标签集
    X = train_ds.reshape(-1, 300, 1)
    Y = train_ds

为什么这样就会出现

把
X = train_ds.reshape(-1, 300, 1)
Y = train_ds
改成
X = train_ds[:, 300].reshape(-1, 300, 1)
Y = train_ds[:, 300]
就能运行出来了呢？那个[:, 300]是什么意思，看不懂

Answer 1

http://t.csdn.cn/zj6sG