meshgrid
顧名思義創建一個正交網格。如果你用3個參數調用它,它將是一個3d網格。現在網格是三維點排列,但每個點有三個座標。因此meshgrid
爲每個座標返回3個數組。
從中獲得一個3d數組的標準方法是應用具有三個參數的矢量化函數。下面是一個簡單的例子:
>>> x = arange(7)
>>> y = arange(0,30,10)
>>> z = arange(0,200,100)
>>> ym, zm, xm = meshgrid(y, z, x)
>>> xm
array([[[0, 1, 2, 3, 4, 5, 6],
[0, 1, 2, 3, 4, 5, 6],
[0, 1, 2, 3, 4, 5, 6]],
[[0, 1, 2, 3, 4, 5, 6],
[0, 1, 2, 3, 4, 5, 6],
[0, 1, 2, 3, 4, 5, 6]]])
>>> ym
array([[[ 0, 0, 0, 0, 0, 0, 0],
[10, 10, 10, 10, 10, 10, 10],
[20, 20, 20, 20, 20, 20, 20]],
[[ 0, 0, 0, 0, 0, 0, 0],
[10, 10, 10, 10, 10, 10, 10],
[20, 20, 20, 20, 20, 20, 20]]])
>>> zm
array([[[ 0, 0, 0, 0, 0, 0, 0],
[ 0, 0, 0, 0, 0, 0, 0],
[ 0, 0, 0, 0, 0, 0, 0]],
[[100, 100, 100, 100, 100, 100, 100],
[100, 100, 100, 100, 100, 100, 100],
[100, 100, 100, 100, 100, 100, 100]]])
>>> cube = xm + ym + zm
>>> cube
array([[[ 0, 1, 2, 3, 4, 5, 6],
[ 10, 11, 12, 13, 14, 15, 16],
[ 20, 21, 22, 23, 24, 25, 26]],
[[100, 101, 102, 103, 104, 105, 106],
[110, 111, 112, 113, 114, 115, 116],
[120, 121, 122, 123, 124, 125, 126]]])
>>> cube[0, 2, 6]
26
我寧願希望能夠把我自己的號碼所以想看看不像一個序列 –
然後就往裏面... A = np.arange(27 ).reshape(3,3,3)...或其他... a.fill(0) – NaN