我們有以下具有 x 和 y 坐標的二維陣列：
x = np.array([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11], [12, 13, 14, 15]])
我們將其展平x = np.array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]) ：）
我們的目標是將平移應用到 x 方向、y 方向。
我們正在處理一個 4x4 陣列（晶格），第一個變換是 1 向 x 方向移動：所以從 '[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]' 我們得到'[1, 2, 3, 0, 5, 6, 7, 4, 9, 10, 11, 8, 13, 14, 15, 12]'。
下一個變換是 x 的兩個位移：從 '[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]' 我們得到 '[2 , 3, 0, 1, 6, 7, 4, 5, 10, 11, 8, 9, 14, 15, 12, 13]'。
我們想要得到這個（扁平的）陣列：
y = np.array([[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15],
[1, 2, 3, 0, 5, 6, 7, 4, 9, 10, 11, 8, 13, 14, 15, 12],
[2, 3, 0, 1, 6, 7, 4, 5, 10, 11, 8, 9, 14, 15, 12, 13],
[3, 0, 1, 2, 7, 4, 5, 6, 11, 8, 9, 10, 15, 12, 13, 14],
[4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 0, 1, 2, 3],
[5, 6, 7, 4, 9, 10, 11, 8, 13, 14, 15, 12, 1, 2, 3, 0],
[6, 7, 4, 5, 10, 11, 8, 9, 14, 15, 12, 13, 2, 3, 0, 1],
[7, 4, 5, 6, 11, 8, 9, 10, 15, 12, 13, 14, 3, 0, 1, 2],
[8, 9, 10, 11, 12, 13, 14, 15, 0, 1, 2, 3, 4, 5, 6, 7],
[9, 10, 11, 8, 13, 14, 15, 12, 1, 2, 3, 0, 5, 6, 7, 4],
[10, 11, 8, 9, 14, 15, 12, 13, 2, 3, 0, 1, 6, 7, 4, 5],
[11, 8, 9, 10, 15, 12, 13, 14, 3, 0, 1, 2, 7, 4, 5, 6],
[12, 13, 14, 15, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11],
[13, 14, 15, 12, 1, 2, 3, 0, 5, 6, 7, 4, 9, 10, 11, 8],
[14, 15, 12, 13, 2, 3, 0, 1, 6, 7, 4, 5, 10, 11, 8, 9],
[15, 12, 13, 14, 3, 0, 1, 2, 7, 4, 5, 6, 11, 8, 9, 10]])
我嘗試使用：
y = np.roll(np.roll(x, -1), -1)
uj5u.com熱心網友回復：
可以連接兩個vstack操作。首先，roll在axis=1，然后，roll在axis=0。
np.vstack([np.roll(np.roll(arr, -i, axis=0), -x, axis=1).flatten() \
for x in range(arr.shape[0])] \
for i in range(arr.shape[1]))
array([[ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15],
[ 1, 2, 3, 0, 5, 6, 7, 4, 9, 10, 11, 8, 13, 14, 15, 12],
[ 2, 3, 0, 1, 6, 7, 4, 5, 10, 11, 8, 9, 14, 15, 12, 13],
[ 3, 0, 1, 2, 7, 4, 5, 6, 11, 8, 9, 10, 15, 12, 13, 14],
[ 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 0, 1, 2, 3],
[ 5, 6, 7, 4, 9, 10, 11, 8, 13, 14, 15, 12, 1, 2, 3, 0],
[ 6, 7, 4, 5, 10, 11, 8, 9, 14, 15, 12, 13, 2, 3, 0, 1],
[ 7, 4, 5, 6, 11, 8, 9, 10, 15, 12, 13, 14, 3, 0, 1, 2],
[ 8, 9, 10, 11, 12, 13, 14, 15, 0, 1, 2, 3, 4, 5, 6, 7],
[ 9, 10, 11, 8, 13, 14, 15, 12, 1, 2, 3, 0, 5, 6, 7, 4],
[10, 11, 8, 9, 14, 15, 12, 13, 2, 3, 0, 1, 6, 7, 4, 5],
[11, 8, 9, 10, 15, 12, 13, 14, 3, 0, 1, 2, 7, 4, 5, 6],
[12, 13, 14, 15, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11],
[13, 14, 15, 12, 1, 2, 3, 0, 5, 6, 7, 4, 9, 10, 11, 8],
[14, 15, 12, 13, 2, 3, 0, 1, 6, 7, 4, 5, 10, 11, 8, 9],
[15, 12, 13, 14, 3, 0, 1, 2, 7, 4, 5, 6, 11, 8, 9, 10]])
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